add TODO

Author: ywelsch

server/src/test/java/org/elasticsearch/indices/state/RareClusterStateIT.java

@@ -192,7 +192,7 @@ public void testDelayedMappingPropagationOnPrimary() throws Exception {
         Settings settings = Settings.builder()
             .put(DiscoverySettings.COMMIT_TIMEOUT_SETTING.getKey(), "30s") // explicitly set so it won't default to publish timeout
             .put(DiscoverySettings.PUBLISH_TIMEOUT_SETTING.getKey(), "0s") // don't wait post commit as we are blocking things by design
-            .put(TestZenDiscovery.USE_ZEN2.getKey(), false) // stops 1 node out of 2
+            .put(TestZenDiscovery.USE_ZEN2.getKey(), false) // TODO: convert test to support Zen2
             .build();
         final List<String> nodeNames = internalCluster().startNodes(2, settings);
         assertFalse(client().admin().cluster().prepareHealth().setWaitForNodes("2").get().isTimedOut());
@@ -307,7 +307,7 @@ public void testDelayedMappingPropagationOnReplica() throws Exception {
             Settings.builder()
                 .put(DiscoverySettings.COMMIT_TIMEOUT_SETTING.getKey(), "30s") // explicitly set so it won't default to publish timeout
                 .put(DiscoverySettings.PUBLISH_TIMEOUT_SETTING.getKey(), "0s") // don't wait post commit as we are blocking things by design
-                .put(TestZenDiscovery.USE_ZEN2.getKey(), false) // stops 1 node out of 2
+                .put(TestZenDiscovery.USE_ZEN2.getKey(), false) // TODO: convert test to support Zen2
                 .build());
         assertFalse(client().admin().cluster().prepareHealth().setWaitForNodes("2").get().isTimedOut());