Intermittent failure in config pusher test

https://jenkins.opendaylight.org/controller/job/controller-verify/7694/

LOG:
2014-08-12 08:17:32.211 UTC [config-pusher] DEBUG o.o.c.n.p.i.osgi.ConfigPersisterTest - Uncaught exception in thread Thread[config-pusher,5,main]
java.lang.AssertionError: null
at org.mockito.internal.stubbing.InvocationContainerImpl.setMethodForStubbing(InvocationContainerImpl.java:104) ~[mockito-core-1.9.5.jar:na]
at org.mockito.internal.handler.MockHandlerImpl.handle(MockHandlerImpl.java:53) ~[mockito-core-1.9.5.jar:na]
at org.mockito.internal.handler.NullResultGuardian.handle(NullResultGuardian.java:29) ~[mockito-core-1.9.5.jar:na]
at org.mockito.internal.handler.InvocationNotifierHandler.handle(InvocationNotifierHandler.java:38) ~[mockito-core-1.9.5.jar:na]
at org.mockito.internal.creation.MethodInterceptorFilter.intercept(MethodInterceptorFilter.java:51) ~[mockito-core-1.9.5.jar:na]
at org.opendaylight.controller.netconf.mapping.api.NetconfOperationServiceFactory$$EnhancerByMockitoWithCGLIB$$48e0480e.createService(<generated>) ~[mockito-core-1.9.5.jar:na]
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.getOperationService(ConfigPusher.java:141) ~[classes/:na]
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.getOperationServiceWithRetries(ConfigPusher.java:109) ~[classes/:na]
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.pushConfigWithConflictingVersionRetries(ConfigPusher.java:92) ~[classes/:na]
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.pushConfigs(ConfigPusher.java:69) ~[classes/:na]
at org.opendaylight.controller.netconf.persist.impl.osgi.ConfigPersisterActivator$InnerCustomizer$1.run(ConfigPersisterActivator.java:156) ~[classes/:na]
at java.lang.Thread.run(Thread.java:744) ~[na:1.7.0_55]

Error:
java.lang.AssertionError: Expected exception of type class java.lang.IllegalStateException but was java.lang.AssertionError expected:<class java.lang.IllegalStateException> but was:<class java.lang.AssertionError>
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.opendaylight.controller.netconf.persist.impl.osgi.TestingExceptionHandler.assertException(TestingExceptionHandler.java:50)
at org.opendaylight.controller.netconf.persist.impl.osgi.TestingExceptionHandler.assertException(TestingExceptionHandler.java:41)
at org.opendaylight.controller.netconf.persist.impl.osgi.TestingExceptionHandler.assertException(TestingExceptionHandler.java:33)
at org.opendaylight.controller.netconf.persist.impl.osgi.ConfigPersisterTest.testPersisterConflictingVersionException(ConfigPersisterTest.java:117)