Because an failing test on Travis was observered using a timeout of
60s:
org.jivesoftware.smackx.muc.MucMemoryLeakTest > mucMemoryLeakTest FAILED
java.lang.AssertionError: No reference found after 60000ms
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.assertTrue(Assert.java:41)
at org.junit.Assert.assertNotNull(Assert.java:712)
at org.jivesoftware.smack.util.MemoryLeakTestUtil.assertReferencesQueueSize(MemoryLeakTestUtil.java:110)
at org.jivesoftware.smack.util.MemoryLeakTestUtil.noResourceLeakTest(MemoryLeakTestUtil.java:103)
at org.jivesoftware.smackx.muc.MucMemoryLeakTest.mucMemoryLeakTest(MucMemoryLeakTest.java:29)