basic test for ReplicaInfoManager

Change-Id: I604b8b24b9ac0896e6dd2a0650092af76f37968d
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/flow/ReplicaInfoService.java b/core/store/dist/src/main/java/org/onlab/onos/store/flow/ReplicaInfoService.java
index c3f1bbf..e613348 100644
--- a/core/store/dist/src/main/java/org/onlab/onos/store/flow/ReplicaInfoService.java
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/flow/ReplicaInfoService.java
@@ -3,7 +3,7 @@
 import org.onlab.onos.net.DeviceId;
 
 /**
- * Service to return where the Replica should be placed.
+ * Service to return where the replica should be placed.
  */
 public interface ReplicaInfoService {
 
@@ -15,4 +15,19 @@
      * @return placement information
      */
     ReplicaInfo getReplicaInfoFor(DeviceId deviceId);
+
+    /**
+     * Adds the specified replica placement info change listener.
+     *
+     * @param listener the replica placement info change listener
+     */
+    void addListener(ReplicaInfoEventListener listener);
+
+    /**
+     * Removes the specified replica placement info change listener.
+     *
+     * @param listener the replica placement info change listener
+     */
+    void removeListener(ReplicaInfoEventListener listener);
+
 }
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/flow/impl/ReplicaInfoManager.java b/core/store/dist/src/main/java/org/onlab/onos/store/flow/impl/ReplicaInfoManager.java
index 0d4cd08..dcbdb4a 100644
--- a/core/store/dist/src/main/java/org/onlab/onos/store/flow/impl/ReplicaInfoManager.java
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/flow/impl/ReplicaInfoManager.java
@@ -1,5 +1,6 @@
 package org.onlab.onos.store.flow.impl;
 
+import static com.google.common.base.Preconditions.checkNotNull;
 import static org.slf4j.LoggerFactory.getLogger;
 import static org.onlab.onos.store.flow.ReplicaInfoEvent.Type.MASTER_CHANGED;
 
@@ -66,6 +67,16 @@
                                Collections.<NodeId>emptyList());
     }
 
+    @Override
+    public void addListener(ReplicaInfoEventListener listener) {
+        listenerRegistry.addListener(checkNotNull(listener));
+    }
+
+    @Override
+    public void removeListener(ReplicaInfoEventListener listener) {
+        listenerRegistry.removeListener(checkNotNull(listener));
+    }
+
     final class InternalMastershipListener implements MastershipListener {
 
         @Override