Bug fixes in csr1kv_ovs_agent and vif plugging.
Bug fixes in csr1kv_ovs plugin.

Change-Id: I85e2bcdfc44f74d44bcbff25b861971257d679e1
Merge branch 'bp/csr1kv_for_routing' of 172.16.6.9:/opt/stack/quantum into csr1kv_for_routing