Boron RC3 Autorelease Build Test Failure: ActorTest

Boron RC3 is unstable due to a Autorelease Build Test Failure while running
org.opendaylight.netconf.topology.ActorTest.testRealActors:

https://jenkins.opendaylight.org/releng/view/autorelease/job/autorelease-release-boron/org.opendaylight.netconf$netconf-topology/251/testReport/junit/org.opendaylight.netconf.topology/ActorTest/testRealActors/

Error Message

Condition returned by method "testRealActors" in class org.opendaylight.netconf.topology.ActorTest was not fulfilled within 30 seconds.
Stacktrace

com.jayway.awaitility.core.ConditionTimeoutException: Condition returned by method "testRealActors" in class org.opendaylight.netconf.topology.ActorTest was not fulfilled within 30 seconds.
at com.jayway.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:98)
at com.jayway.awaitility.core.CallableCondition.await(CallableCondition.java:78)
at com.jayway.awaitility.core.CallableCondition.await(CallableCondition.java:25)
at com.jayway.awaitility.core.ConditionFactory.until(ConditionFactory.java:713)
at com.jayway.awaitility.core.ConditionFactory.until(ConditionFactory.java:704)
at org.opendaylight.netconf.topology.ActorTest.testRealActors(ActorTest.java:173)