Remove redundant codes

the code is redundant, it should be removed

Change-Id: I050bfc0b4d72037510dc2f3d729a564869a374c2
Closes-Bug: #1265132
Rename check_nvp_config utility tool

Add new entry point whilst preserving the old ones
for backward compatibility.

Partial-implements blueprint nicira-plugin-renaming

Change-Id: I3c5b5dcd316df3867f434bbc35483a2636b715d8
nicira: fix db integrity error during port deletion

Due to the fact that plugin port operations are not
transactional (as they involve non synchronized DB
and Controller operations), concurrent (interleaved)
port requests may accidentally cause the insertion
of the mapping entry (neutron-port-id, nvp-port-id)
more than once. In case this occurs, it's safe to
expect the failure and continue the normal process
of the operation being requested.

Closes-bug: #1265081

Change-Id: Ifcf5b453fa08145df844c2de3cbb08bf2f4baa59
Merge "Rename check_nvp_config utility tool"
Merge "nicira: fix db integrity error during port deletion"