testPromotionWithoutFingerprint seems to fail randomly.
junit.framework.AssertionFailedError: expected:<1> but was:<0>
	at junit.framework.Assert.fail(Assert.java:57)
	at junit.framework.Assert.failNotEquals(Assert.java:329)
	at junit.framework.Assert.assertEquals(Assert.java:78)
	at junit.framework.Assert.assertEquals(Assert.java:234)
	at junit.framework.Assert.assertEquals(Assert.java:241)
	at junit.framework.TestCase.assertEquals(TestCase.java:409)
	at hudson.plugins.promoted_builds.PromotionProcessTest.testPromotionWithoutFingerprint(PromotionProcessTest.java:108)
[maven-release-plugin] prepare release promoted-builds-2.18