InitialClusterSizeTest can hang during teardown

"testng-InitialClusterSizeTest" #13 prio=5 os_prio=0 tid=0x00007f1874d1f000 nid=0x1778 waiting for monitor entry [0x00007f181bafc000]
   java.lang.Thread.State: BLOCKED (on object monitor)
	at org.infinispan.factories.GlobalComponentRegistry.stop(GlobalComponentRegistry.java:280)
	- waiting to lock <0x0000000093c7afe0> (a org.infinispan.factories.GlobalComponentRegistry)
	at org.infinispan.manager.DefaultCacheManager.stop(DefaultCacheManager.java:701)
	- locked <0x000000008a005b80> (a org.infinispan.manager.DefaultCacheManager)
	at org.infinispan.test.TestingUtil.killCacheManagers(TestingUtil.java:656)
	at org.infinispan.test.MultipleCacheManagersTest.clearContent(MultipleCacheManagersTest.java:138)
	at sun.reflect.GeneratedMethodAccessor175.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
	at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:564)
	at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:786)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
	at org.testng.TestRunner.privateRun(TestRunner.java:767)
	at org.testng.TestRunner.run(TestRunner.java:617)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:348)
	at org.testng.SuiteRunner.access$000(SuiteRunner.java:38)
	at org.testng.SuiteRunner$SuiteWorker.run(SuiteRunner.java:382)
	at org.testng.internal.thread.ThreadUtil$2.call(ThreadUtil.java:64)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"ForkThread-4,InitialClusterSizeTest" #167842 prio=5 os_prio=0 tid=0x00007f1824163800 nid=0x3316 waiting on condition [0x00007f17e62b9000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
	at java.lang.Thread.sleep(Native Method)
	at org.jgroups.util.Util.sleep(Util.java:1818)
	at org.jgroups.protocols.pbcast.ClientGmsImpl.firstOfAllClients(ClientGmsImpl.java:181)
	at org.jgroups.protocols.pbcast.ClientGmsImpl.joinInternal(ClientGmsImpl.java:97)
	at org.jgroups.protocols.pbcast.ClientGmsImpl.join(ClientGmsImpl.java:41)
	at org.jgroups.protocols.pbcast.GMS.down(GMS.java:1066)
	at org.jgroups.protocols.tom.TOA.down(TOA.java:73)
	at org.jgroups.protocols.FlowControl.down(FlowControl.java:302)
	at org.jgroups.protocols.RSVP.down(RSVP.java:102)
	at org.jgroups.stack.ProtocolStack.down(ProtocolStack.java:900)
	at org.jgroups.JChannel.down(JChannel.java:644)
	at org.jgroups.JChannel._connect(JChannel.java:873)
	at org.jgroups.JChannel.connect(JChannel.java:369)
	- locked <0x0000000093c7aea0> (a org.jgroups.JChannel)
	at org.jgroups.JChannel.connect(JChannel.java:360)
	- locked <0x0000000093c7aea0> (a org.jgroups.JChannel)
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.startJGroupsChannelIfNeeded(JGroupsTransport.java:221)
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.start(JGroupsTransport.java:211)
	at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.infinispan.commons.util.ReflectionUtil.invokeAccessibly(ReflectionUtil.java:168)
	at org.infinispan.factories.AbstractComponentRegistry$PrioritizedMethod.invoke(AbstractComponentRegistry.java:867)
	at org.infinispan.factories.AbstractComponentRegistry.invokeStartMethods(AbstractComponentRegistry.java:633)
	at org.infinispan.factories.AbstractComponentRegistry.internalStart(AbstractComponentRegistry.java:622)
	at org.infinispan.factories.AbstractComponentRegistry.start(AbstractComponentRegistry.java:547)
	- locked <0x0000000093c7afe0> (a org.infinispan.factories.GlobalComponentRegistry)
	at org.infinispan.factories.GlobalComponentRegistry.start(GlobalComponentRegistry.java:244)
	- locked <0x0000000093c7afe0> (a org.infinispan.factories.GlobalComponentRegistry)
	at org.infinispan.manager.DefaultCacheManager.start(DefaultCacheManager.java:666)
	at org.infinispan.remoting.transport.InitialClusterSizeTest.lambda$testInitialClusterSize$799(InitialClusterSizeTest.java:47)
	at org.infinispan.remoting.transport.InitialClusterSizeTest$$Lambda$2092/593962598.run(Unknown Source)
	at org.infinispan.test.AbstractInfinispanTest$RunnableWrapper.run(AbstractInfinispanTest.java:510)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"ForkThread-2,InitialClusterSizeTest" #167840 prio=5 os_prio=0 tid=0x00007f1824164800 nid=0x3314 waiting on condition [0x00007f17eec40000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
	at java.lang.Thread.sleep(Native Method)
	at org.jgroups.util.Util.sleep(Util.java:1818)
	at org.jgroups.protocols.pbcast.ClientGmsImpl.firstOfAllClients(ClientGmsImpl.java:181)
	at org.jgroups.protocols.pbcast.ClientGmsImpl.joinInternal(ClientGmsImpl.java:97)
	at org.jgroups.protocols.pbcast.ClientGmsImpl.join(ClientGmsImpl.java:41)
	at org.jgroups.protocols.pbcast.GMS.down(GMS.java:1066)
	at org.jgroups.protocols.tom.TOA.down(TOA.java:73)
	at org.jgroups.protocols.FlowControl.down(FlowControl.java:302)
	at org.jgroups.protocols.RSVP.down(RSVP.java:102)
	at org.jgroups.stack.ProtocolStack.down(ProtocolStack.java:900)
	at org.jgroups.JChannel.down(JChannel.java:644)
	at org.jgroups.JChannel._connect(JChannel.java:873)
	at org.jgroups.JChannel.connect(JChannel.java:369)
	- locked <0x0000000093c7b7f0> (a org.jgroups.JChannel)
	at org.jgroups.JChannel.connect(JChannel.java:360)
	- locked <0x0000000093c7b7f0> (a org.jgroups.JChannel)
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.startJGroupsChannelIfNeeded(JGroupsTransport.java:221)
	at org.infinispan.remoting.transport.jgroups.JGroupsTransport.start(JGroupsTransport.java:211)
	at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.infinispan.commons.util.ReflectionUtil.invokeAccessibly(ReflectionUtil.java:168)
	at org.infinispan.factories.AbstractComponentRegistry$PrioritizedMethod.invoke(AbstractComponentRegistry.java:867)
	at org.infinispan.factories.AbstractComponentRegistry.invokeStartMethods(AbstractComponentRegistry.java:633)
	at org.infinispan.factories.AbstractComponentRegistry.internalStart(AbstractComponentRegistry.java:622)
	at org.infinispan.factories.AbstractComponentRegistry.start(AbstractComponentRegistry.java:547)
	- locked <0x0000000093c7b930> (a org.infinispan.factories.GlobalComponentRegistry)
	at org.infinispan.factories.GlobalComponentRegistry.start(GlobalComponentRegistry.java:244)
	- locked <0x0000000093c7b930> (a org.infinispan.factories.GlobalComponentRegistry)
	at org.infinispan.manager.DefaultCacheManager.start(DefaultCacheManager.java:666)
	at org.infinispan.remoting.transport.InitialClusterSizeTest.lambda$testInitialClusterSize$799(InitialClusterSizeTest.java:47)
	at org.infinispan.remoting.transport.InitialClusterSizeTest$$Lambda$2092/593962598.run(Unknown Source)
	at org.infinispan.test.AbstractInfinispanTest$RunnableWrapper.run(AbstractInfinispanTest.java:510)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)