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java.lang.NoClassDefFoundError: org/junit/Assert	at com.hazelcast.test.mocknetwork.MockJoiner.doJoin(MockJoiner.java:55)	at com.hazelcast.cluster.impl.AbstractJoiner.join(AbstractJoiner.java:103)	at com.hazelcast.instance.Node.join(Node.java:581)	at com.hazelcast.instance.Node.start(Node.java:339)	at com.hazelcast.instance.HazelcastInstanceImpl.(HazelcastInstanceImpl.java:131)	at com.hazelcast.instance.HazelcastInstanceFactory.constructHazelcastInstance(HazelcastInstanceFactory.java:160)	at com.hazelcast.instance.HazelcastInstanceFactory.newHazelcastInstance(HazelcastInstanceFactory.java:143)	at com.hazelcast.test.TestHazelcastInstanceFactory.newHazelcastInstance(TestHazelcastInstanceFactory.java:112)