Allowed address pair: Removing check for overlap with fixed ips

Some of the overlap check has been removed in the following patch:
https://review.openstack.org/#/c/94508/
But the patch did not remove all the overlap check. I remove the
rest part.

Change-Id: I575ec54c0b3d6dc31ef80819d4258c6d162b4cfd
Closes-Bug: #1326007
NSX: propagate network name updates to backend

This patch updates the logical switch name on the NSX backend
if a new network name is provided in the update request.

This patches also fixes tag management for update_lswitch in
neutron.plugins.vmware.nsxlib.switch and add relevant unit
tests.

Closes-Bug: 1276128
Change-Id: Ic8921c059012a875006701ac10d2dcae97f30253
Merge "NSX: propagate network name updates to backend"
Merge "Allowed address pair: Removing check for overlap with fixed ips"