Moving vpls app from onos-app-samples to onos repo

Change-Id: I27f8bcac00350b072a6dc33debc8adc589033490
diff --git a/apps/pom.xml b/apps/pom.xml
index 8377ff3..032b327 100644
--- a/apps/pom.xml
+++ b/apps/pom.xml
@@ -67,6 +67,7 @@
         <module>vrouter</module>
         <module>openstackrouting</module>
         <module>cordmcast</module>
+        <module>vpls</module>
   </modules>
 
     <properties>