Replace Unified* services with MembershipService for subgroup membership

Change-Id: Iabff173ce3501d1ed300513cac445bb712614bd9
diff --git a/core/api/src/main/java/org/onosproject/cluster/ClusterAdminService.java b/core/api/src/main/java/org/onosproject/cluster/ClusterAdminService.java
index e680877..d1c4325 100644
--- a/core/api/src/main/java/org/onosproject/cluster/ClusterAdminService.java
+++ b/core/api/src/main/java/org/onosproject/cluster/ClusterAdminService.java
@@ -15,14 +15,56 @@
  */
 package org.onosproject.cluster;
 
+import java.util.Set;
+
+import org.onlab.packet.IpAddress;
+
 /**
  * Service for administering the cluster node membership.
- * <p>
- * This service has a view of the cluster membership that is isolated to the local node's version during upgrades.
- * For an equivalent service that has control over all nodes during an upgrade use
- * {@link UnifiedClusterAdminService}.
- *
- * @see UnifiedClusterAdminService
  */
-public interface ClusterAdminService extends MembershipAdminService {
+public interface ClusterAdminService extends ClusterService {
+
+    /**
+     * Forms cluster configuration based on the specified set of node
+     * information.&nbsp; This method resets and restarts the controller
+     * instance.
+     *
+     * @param nodes    set of nodes that form the cluster
+     */
+    void formCluster(Set<ControllerNode> nodes);
+
+    /**
+     * Forms cluster configuration based on the specified set of node
+     * information.&nbsp; This method resets and restarts the controller
+     * instance.
+     *
+     * @param nodes    set of nodes that form the cluster
+     * @param partitionSize number of nodes to compose a partition
+     */
+    void formCluster(Set<ControllerNode> nodes, int partitionSize);
+
+    /**
+     * Adds a new controller node to the cluster.
+     *
+     * @param nodeId  controller node identifier
+     * @param ip      node IP listen address
+     * @param tcpPort tcp listen port
+     * @return newly added node
+     */
+    ControllerNode addNode(NodeId nodeId, IpAddress ip, int tcpPort);
+
+    /**
+     * Removes the specified node from the cluster node list.
+     *
+     * @param nodeId controller node identifier
+     */
+    void removeNode(NodeId nodeId);
+
+    /**
+     * Marks the current node as fully started or not.
+     *
+     * @param started true indicates all components have been started
+     */
+    void markFullyStarted(boolean started);
+
 }