Random failure.

https://jenkins.ci.cloudbees.com/job/core/job/jenkins_main_trunk/1199/testReport/hudson.tasks/FingerprinterTest/fingerprintCleanup/
java.lang.AssertionError: expected:<[hudson.model.FreeStyleProject@590e5b8[test0]]> but was:<[]>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:743)
	at org.junit.Assert.assertEquals(Assert.java:118)
	at org.junit.Assert.assertEquals(Assert.java:144)
	at hudson.tasks.FingerprinterTest.fingerprintCleanup(FingerprinterTest.java:302)