Added SDN-IP CLI command to show the BGP neighbors:
  onos:bgp-neighbors
OR
  onos:bgp-neighbors -n <NeighborID>
  onos:bgp-neighbors --neighbor <NeighborID>

Change-Id: I4e4185d9484384d9e3aa5304c897410b23a24238
diff --git a/apps/sdnip/src/main/java/org/onlab/onos/sdnip/SdnIpService.java b/apps/sdnip/src/main/java/org/onlab/onos/sdnip/SdnIpService.java
index 936b7e8..8503bee 100644
--- a/apps/sdnip/src/main/java/org/onlab/onos/sdnip/SdnIpService.java
+++ b/apps/sdnip/src/main/java/org/onlab/onos/sdnip/SdnIpService.java
@@ -18,12 +18,20 @@
 import java.util.Collection;
 
 import org.onlab.onos.sdnip.bgp.BgpRouteEntry;
+import org.onlab.onos.sdnip.bgp.BgpSession;
 
 /**
  * Service interface exported by SDN-IP.
  */
 public interface SdnIpService {
     /**
+     * Gets the BGP sessions.
+     *
+     * @return the BGP sessions
+     */
+    public Collection<BgpSession> getBgpSessions();
+
+    /**
      * Gets the BGP routes.
      *
      * @return the BGP routes