Random failing BreakpointTests.testDeferredBreakpointsSepVM

[fedejeanne]

Failed in this build of https://github.com/eclipse-platform/eclipse.platform/pull/666

org.eclipse.ant.tests.ui.debug.BreakpointTests.testDeferredBreakpointsSepVM -- Time elapsed: 4.353 s <<< FAILURE!
junit.framework.AssertionFailedError: suspended, but not by breakpoint
	at junit.framework.Assert.fail(Assert.java:57)
	at junit.framework.Assert.assertTrue(Assert.java:22)
	at junit.framework.Assert.assertNotNull(Assert.java:256)
	at junit.framework.TestCase.assertNotNull(TestCase.java:399)
	at org.eclipse.ant.tests.ui.debug.BreakpointTests.deferredBreakpoints(BreakpointTests.java:60)