Fixed minor bug when editing sdn-controller. Modified test_RO.py according to openmano behaviour. Added additional tests for SDN

Change-Id: Iacb895c0f95e24e0e1b1c1b33a8072f8edd40534
Signed-off-by: Pablo Montes Moreno <pablo.montesmoreno@telefonica.com>
diff --git a/openmano b/openmano
index 0e4287e..45db340 100755
--- a/openmano
+++ b/openmano
@@ -1161,7 +1161,7 @@
     if args.ip != None:
         controller_dict['ip'] = args.ip
     if args.port != None:
-        controller_dict['port'] = args.port
+        controller_dict['port'] = int(args.port)
     if args.dpid != None:
         controller_dict['dpid'] = args.dpid
     if args.type != None: