Wrong nodeIdentifier for MD-SAL service lookup

MD-SAL service lookup in FRM is based on nodeIdentifier which looks like: /nodes/node[id]/aug:flowCapableNode. This usually works.
But service provider (OFPlugin) registers routed services under nodeIdentifier: /nodes/node[id].

Result is that MD-SAL is not able to directly resolve provider and redirects request to binding independent context and then back to binding aware. Side effects are: performance leak caused by conversions and underlying augmentations are getting lost (discovered by nicira extensions - match).