Moving classes around, reflecting discussion with Madan.

Change-Id: I83a08fc3f31003b6a521f3f7fe48c47b5c489bb1

-package org.onlab.onos.store.cluster.messaging.impl;
+package org.onlab.onos.store.cluster.impl;
 
 import org.onlab.onos.store.cluster.messaging.MessageSubject;
 
-public final class ClusterMessageSubjects {
+public final class ClusterManagementMessageSubjects {
     // avoid instantiation
-    private ClusterMessageSubjects() {}
+    private ClusterManagementMessageSubjects() {}
 
     public static final MessageSubject CLUSTER_MEMBERSHIP_EVENT = new MessageSubject("CLUSTER_MEMBERSHIP_EVENT");
 }

-package org.onlab.onos.store.cluster.messaging.impl;
+package org.onlab.onos.store.cluster.impl;
 
 import org.onlab.onos.cluster.ControllerNode;
 

-package org.onlab.onos.store.cluster.messaging.impl;
+package org.onlab.onos.store.cluster.impl;
 
 public enum ClusterMembershipEventType {
     NEW_MEMBER,

@@ -17,6 +17,8 @@ import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.apache.felix.scr.annotations.Service;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.NodeId;
+import org.onlab.onos.store.cluster.impl.ClusterMembershipEvent;
+import org.onlab.onos.store.cluster.impl.ClusterMembershipEventType;
 import org.onlab.onos.store.cluster.impl.ClusterNodesDelegate;
 import org.onlab.onos.store.cluster.messaging.ClusterCommunicationAdminService;
 import org.onlab.onos.store.cluster.messaging.ClusterCommunicationService;

-package org.onlab.onos.store.cluster.impl;
+package org.onlab.onos.store.cluster.messaging.impl;
 
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;

-package org.onlab.onos.store.cluster.messaging;
+package org.onlab.onos.store.common.impl;
 
 import java.util.Map;
 

-package org.onlab.onos.store.cluster.messaging;
+package org.onlab.onos.store.common.impl;
 
 import java.util.Map;
 import java.util.Set;

@@ -8,7 +8,7 @@ import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.Device;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.store.Timestamp;
-import org.onlab.onos.store.cluster.messaging.AntiEntropyAdvertisement;
+import org.onlab.onos.store.common.impl.AntiEntropyAdvertisement;
 
 // TODO DeviceID needs to be changed to something like (ProviderID, DeviceID)
 // TODO: Handle Port as part of these messages, or separate messages for Ports?

@@ -10,7 +10,7 @@ import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.Device;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.store.Timestamp;
-import org.onlab.onos.store.cluster.messaging.AntiEntropyReply;
+import org.onlab.onos.store.common.impl.AntiEntropyReply;
 
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;

@@ -7,6 +7,7 @@ import org.junit.Test;
 import org.onlab.onos.cluster.DefaultControllerNode;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.store.cluster.messaging.impl.ClusterCommunicationManager;
+import org.onlab.onos.store.cluster.messaging.impl.MessageSerializer;
 import org.onlab.netty.NettyMessagingService;
 import org.onlab.packet.IpPrefix;