NSX: passing wrong security_group id mapping to nsx backend

When the async secgroup work was added the update_port() code was not changed
to pass in the nsx security_group uuids. This patch fixes that so that the
nsx uuids are passed in instead of neutron.

Closes-bug: #1287419

Change-Id: I1a075564f2548764de15b85b2970b5f360412eb2
Merge "NSX: passing wrong security_group id mapping to nsx backend"