Added client config to client instantiation do that connection is bei…

…ng retried indefinitely until the server comes up. (#15801)

fixes #15203

hazelcast/src/test/java/com/hazelcast/client/ClientClusterRestartEventTest.java

@@ -75,7 +75,7 @@ private ClientConfig newClientConfig() {
     public void testSingleMemberRestart() {
         HazelcastInstance instance = hazelcastFactory.newHazelcastInstance(newConfig());
         Member oldMember = instance.getCluster().getLocalMember();
-        HazelcastInstance client = hazelcastFactory.newHazelcastClient();
+        HazelcastInstance client = hazelcastFactory.newHazelcastClient(newClientConfig());
 
         final CountDownLatch memberAdded = new CountDownLatch(1);
         final CountDownLatch memberRemoved = new CountDownLatch(1);