Add intents -p commmand to have some visibility into the pending map

Change-Id: Ic29460d8bf78f185bbfa426bc0aeef309b22cf7f
diff --git a/core/store/dist/src/main/java/org/onosproject/store/ecmap/AntiEntropyAdvertisement.java b/core/store/dist/src/main/java/org/onosproject/store/ecmap/AntiEntropyAdvertisement.java
index 446f96b..23b2dfc 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/ecmap/AntiEntropyAdvertisement.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/ecmap/AntiEntropyAdvertisement.java
@@ -15,6 +15,7 @@
  */
 package org.onosproject.store.ecmap;
 
+import com.google.common.base.MoreObjects;
 import org.onosproject.cluster.NodeId;
 import org.onosproject.store.Timestamp;
 
@@ -80,4 +81,12 @@
         this.timestamps = null;
         this.tombstones = null;
     }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("timestampsSize", timestamps.size())
+                .add("tombstonesSize", tombstones.size())
+                .toString();
+    }
 }