Fixed accidential override of `sfc_encap`

The old code basically hardcoded the use of NSH (which is still broken
in OpenStack's SFC implementation).

Change-Id: I0de4682bca69c7a349d678ae3a8179d78b37c605
Signed-off-by: schillinge <ablu@mail.uni-paderborn.de>
diff --git a/osm_ro/vimconn_openstack.py b/osm_ro/vimconn_openstack.py
index 0930eb0..419caa0 100644
--- a/osm_ro/vimconn_openstack.py
+++ b/osm_ro/vimconn_openstack.py
@@ -1976,7 +1976,7 @@
             self._reload_connection()
             # In networking-sfc the MPLS encapsulation is legacy
             # should be used when no full SFC Encapsulation is intended
-            sfc_encap = 'mpls'
+            correlation = 'mpls'
             if sfc_encap:
                 correlation = 'nsh'
             sfp_dict = {'name': name,