7a8a6a237b
Avoids using the portbindings_db in the Big Switch ML2 driver since ML2 has deprecated that database for its own version that tracks the same information. Also eliminates unnecessary 'binding_host' field since it is now always the same as as the 'portbinding:host_id' field. Closes-Bug: #1300628 Change-Id: I17d47cb446cdd2e989c3e0d01b797a81309faaa7