Karaf stucked when running iOSGI integration tests on IBM JDK

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  Apache Karaf (2.3.3)

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karaf@root> Failed to instantiate SLF4J LoggerFactory
Reported exception:
java.lang.NoClassDefFoundError: org.slf4j.impl.StaticLoggerBinder
	at org.slf4j.LoggerFactory.bind(LoggerFactory.java:121)
	at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:111)
	at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:268)
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:241)
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:254)
	at org.ops4j.pax.exam.rbc.internal.Activator.<clinit>(Activator.java:46)
	at java.lang.J9VMInternals.newInstanceImpl(Native Method)
	at java.lang.Class.newInstance(Class.java:1774)
	at org.apache.felix.framework.Felix.createBundleActivator(Felix.java:4177)
	at org.apache.felix.framework.Felix.activateBundle(Felix.java:1972)
	at org.apache.felix.framework.Felix.startBundle(Felix.java:1895)
	at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:944)
	at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:931)
	at org.apache.karaf.features.internal.FeaturesServiceImpl.installFeatures(FeaturesServiceImpl.java:530)
	at org.apache.karaf.features.internal.FeaturesServiceImpl.start(FeaturesServiceImpl.java:1207)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:94)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
	at java.lang.reflect.Method.invoke(Method.java:619)
	at org.apache.aries.blueprint.utils.ReflectionUtils.invoke(ReflectionUtils.java:297)
	at org.apache.aries.blueprint.container.BeanRecipe.invoke(BeanRecipe.java:958)
	at org.apache.aries.blueprint.container.BeanRecipe.runBeanProcInit(BeanRecipe.java:712)
	at org.apache.aries.blueprint.container.BeanRecipe.internalCreate2(BeanRecipe.java:824)
	at org.apache.aries.blueprint.container.BeanRecipe.internalCreate(BeanRecipe.java:787)
	at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:79)
	at java.util.concurrent.FutureTask.run(FutureTask.java:273)
	at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:88)
	at org.apache.aries.blueprint.container.BlueprintRepository.createInstances(BlueprintRepository.java:245)
	at org.apache.aries.blueprint.container.BlueprintRepository.createAll(BlueprintRepository.java:183)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.instantiateEagerComponents(BlueprintContainerImpl.java:668)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:370)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:261)
	at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:259)
	at org.apache.aries.blueprint.container.BlueprintExtender.modifiedBundle(BlueprintExtender.java:222)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:500)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:433)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.track(BundleHookBundleTracker.java:725)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.bundleChanged(BundleHookBundleTracker.java:463)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$BundleEventHook.event(BundleHookBundleTracker.java:422)
	at org.apache.felix.framework.util.SecureAction.invokeBundleEventHook(SecureAction.java:1103)
	at org.apache.felix.framework.util.EventDispatcher.createWhitelistFromHooks(EventDispatcher.java:695)
	at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:483)
	at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4244)
	at org.apache.felix.framework.Felix.startBundle(Felix.java:1923)
	at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1191)
	at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:295)
	at java.lang.Thread.run(Thread.java:853)
Caused by: java.lang.ClassNotFoundException: org.slf4j.impl.StaticLoggerBinder not found by org.ops4j.pax.exam.rbc [87]
	at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1460)
	at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:72)
	at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1843)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:827)