Chain flaky xwiki-enterprise-test-wysiwyg tests caused by random deaths of the test instance

Error Message

[tmDrawerActivator] isn't present.

Error Message

Failed to shutdown PersistentTestContext

Stacktrace

java.lang.RuntimeException: Failed to shutdown PersistentTestContext
	at org.xwiki.test.ui.PageObjectSuite.afterTests(PageObjectSuite.java:101)
	at org.xwiki.test.integration.XWikiExecutorSuite.run(XWikiExecutorSuite.java:197)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:367)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:274)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:161)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:290)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:242)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:121)
Caused by: java.lang.RuntimeException: Process failed to close properly after [300000] seconds, process ended [true]. Exit code [143], message [Process exited with an error: 143 (Exit value: 143)]. Failing test.
	at org.xwiki.test.integration.XWikiExecutor.waitForProcessToFinish(XWikiExecutor.java:390)
	at org.xwiki.test.integration.XWikiExecutor.stop(XWikiExecutor.java:354)
	at org.xwiki.test.ui.PersistentTestContext.shutdown(PersistentTestContext.java:114)
	at org.xwiki.test.ui.PageObjectSuite.afterTests(PageObjectSuite.java:99)
	... 8 more

Standard Output

13:13:25.670 [Thread-15] INFO  o.x.t.i.XWikiLogOutputStream - Lock file [/var/tmp/xwiki-8080.lck] is missing. Aborting stop.