I tried with the latest JBT 4.2.0.Alpha2a build.

StackTrace:
--------------------
There is no active view
org.eclipse.swtbot.swt.finder.exceptions.WidgetNotFoundException: There is no active view
at org.eclipse.swtbot.eclipse.finder.SWTWorkbenchBot.activeView(SWTWorkbenchBot.java:200)
at org.jboss.tools.tests.installation.InstallFromCentralTest.setUp(InstallFromCentralTest.java:52)
at org.eclipse.swtbot.swt.finder.junit.SWTBotJunit4ClassRunner.run(SWTBotJunit4ClassRunner.java:54)
at org.eclipse.swtbot.eclipse.junit.headless.EclipseTestRunner.run(EclipseTestRunner.java:350)
at org.eclipse.swtbot.eclipse.junit.headless.EclipseTestRunner.run(EclipseTestRunner.java:208)
at org.eclipse.swtbot.eclipse.junit.headless.UITestApplication.runTests(UITestApplication.java:116)
at org.eclipse.e4.ui.internal.workbench.swt.E4Testable$1.run(E4Testable.java:72)
at java.lang.Thread.run(Thread.java:744)