[ONOS-2607] Implement BGP LS topology provider and listen on Node and Link changes of BGP Controller.

Change-Id: I811ca8d078ab5825819cef81fd8096d842f76c44
diff --git a/providers/pom.xml b/providers/pom.xml
index a02f8d4..32890b9 100644
--- a/providers/pom.xml
+++ b/providers/pom.xml
@@ -39,6 +39,7 @@
         <module>null</module>
         <module>pcep</module>
         <module>ovsdb</module>
+        <module>bgp</module>
     </modules>
 
     <dependencies>