Test: remove wait on events from multipleNodesShutdownNonMasterNodes

The test validates that minimum master node is honored after shutting down nodes. When nodes are restarted we may go through a couple of master election of a master is elected and  discovers some of the old nodes left before all new node have joined. Processing that node failure the master de-elects it self, which is fine because we will start a new master election. Test however runs a clusterHealth call with a  wait for event. This is implemented using a cluster state update task which fails when the master steps down. Longer term fix requires a rewrite of the cluster health API code but a quick fix is not check for events (not needed for this test).

src/test/java/org/elasticsearch/cluster/MinimumMasterNodesTests.java

@@ -236,12 +236,12 @@ public boolean apply(Object obj) {
         logger.info("--> start back the 2 nodes ");
         String[] newNodes = internalCluster().startNodesAsync(2, settings).get().toArray(Strings.EMPTY_ARRAY);
 
-        clusterHealthResponse = client().admin().cluster().prepareHealth().setWaitForEvents(Priority.LANGUID).setWaitForNodes("4").execute().actionGet();
+        clusterHealthResponse = client().admin().cluster().prepareHealth().setWaitForNodes("4").execute().actionGet();
         assertThat(clusterHealthResponse.isTimedOut(), equalTo(false));
 
-        logger.info("Running Cluster Health");
+        logger.info("--> running Cluster Health");
         ClusterHealthResponse clusterHealth = client().admin().cluster().health(clusterHealthRequest().waitForGreenStatus()).actionGet();
-        logger.info("Done Cluster Health, status " + clusterHealth.getStatus());
+        logger.info("--> done Cluster Health, status " + clusterHealth.getStatus());
         assertThat(clusterHealth.isTimedOut(), equalTo(false));
         assertThat(clusterHealth.getStatus(), equalTo(ClusterHealthStatus.GREEN));