First round of ClusterMetadata improvements:
    Introduced a PartitionId type for identifying partitions
    Introduced a admin service for making metadata updates
    Update cluster.json format to specify all partitions (including p0) and changed partitionId to be an int.

Change-Id: Ia0617f1ed0ce886680dcee4f5396a4bbdfa225da
diff --git a/core/net/src/main/java/org/onosproject/cluster/impl/ClusterMetadataManager.java b/core/net/src/main/java/org/onosproject/cluster/impl/ClusterMetadataManager.java
index a0f7a83..1bb2182 100644
--- a/core/net/src/main/java/org/onosproject/cluster/impl/ClusterMetadataManager.java
+++ b/core/net/src/main/java/org/onosproject/cluster/impl/ClusterMetadataManager.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2015-2016 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.onosproject.cluster.impl;
 
 import static com.google.common.base.Preconditions.checkNotNull;
@@ -17,6 +32,7 @@
 import org.apache.felix.scr.annotations.Service;
 import org.onlab.packet.IpAddress;
 import org.onosproject.cluster.ClusterMetadata;
+import org.onosproject.cluster.ClusterMetadataAdminService;
 import org.onosproject.cluster.ClusterMetadataEvent;
 import org.onosproject.cluster.ClusterMetadataEventListener;
 import org.onosproject.cluster.ClusterMetadataService;
@@ -34,10 +50,10 @@
 @Service
 public class ClusterMetadataManager
     extends AbstractListenerManager<ClusterMetadataEvent, ClusterMetadataEventListener>
-    implements ClusterMetadataService {
+    implements ClusterMetadataService, ClusterMetadataAdminService {
 
-    private ControllerNode localNode;
     private final Logger log = getLogger(getClass());
+    private ControllerNode localNode;
 
     private ClusterMetadataStoreDelegate delegate = new InternalStoreDelegate();