Refactored OpenstackSwitching app

[DONE]
- Restructured to activate or deactivate switching and routing app separately
- Fixed to add or remove host when port is detected or vanished
- Use openstack node service to get integration bridges and data IP

[TODO]
- Remove use of OpenstackPortInfo
- Support installing flow rules for exising VMs
- Call security group update method when port update triggered from OpenStack

Change-Id: Ic0b2ac3f7ab07f0e20c97c6edfdd1928b9767baf
diff --git a/apps/openstacknetworking/BUCK b/apps/openstacknetworking/BUCK
index 03639d1..3176898 100644
--- a/apps/openstacknetworking/BUCK
+++ b/apps/openstacknetworking/BUCK
@@ -8,5 +8,5 @@
   category = 'Utility',
   url = 'http://onosproject.org',
   included_bundles = BUNDLES,
-  required_apps = [ 'org.onosproject.openstackinterface' ],
+  required_apps = [ 'org.onosproject.openstackrouting', 'org.onosproject.openstackswitching' ]
 )