squash fields equals assert into coordination metadata eq assert

Author: Andrey Ershov

server/src/test/java/org/elasticsearch/cluster/ClusterStateDiffIT.java

@@ -142,11 +142,7 @@ public void testClusterStateDiffSerialization() throws Exception {
             try {
                 // Check non-diffable elements
                 assertThat(clusterStateFromDiffs.version(), equalTo(clusterState.version()));
-                assertThat(clusterStateFromDiffs.term(), equalTo(clusterState.term()));
-                assertThat(clusterStateFromDiffs.stateUUID(), equalTo(clusterState.stateUUID()));
-                assertThat(clusterStateFromDiffs.getLastAcceptedConfiguration(), equalTo(clusterState.getLastAcceptedConfiguration()));
-                assertThat(clusterStateFromDiffs.getLastCommittedConfiguration(), equalTo(clusterState.getLastCommittedConfiguration()));
-                assertThat(clusterStateFromDiffs.getVotingTombstones(), equalTo(clusterState.getVotingTombstones()));
+                assertThat(clusterStateFromDiffs.coordinationMetaData(), equalTo(clusterState.coordinationMetaData()));
 
                 // Check nodes
                 assertThat(clusterStateFromDiffs.nodes().getNodes(), equalTo(clusterState.nodes().getNodes()));