Handle racing condition in OFC port deletion

Multiple delete_port operations can run in parallel.
For such case later operation(s) will receive 404 (NotFound)
error from OFC or NotResultFound sqlalchemy exception.
These are valid exceptions and they should be ignored
in delete_port operations.

Closes-Bug: #1281574

OFCConsistencyBroken is renamed to OFCMappingNotFound
because when multiple delete_port operations run in parallel
OFCConsistencyBroken can occur and it is a valid case
so the excepion name looks inappropriate.

Change-Id: I1511d55994c88b8828f0ff62610c18ddc6dfac8f
Fix NSX migration path

The migration path for the NSX plugin was not working correctly,
as two migrations (extra route and network gateways) were
skipped.
Therefore installations were partially relying on automatic
schema generation.

This patch fixes the migration path, as well as an attribute
whose name in the migration and the DB model differed.

Closes-Bug: 1285095

Change-Id: I9e4db294e618d1419d86e07cfb5505dcc01b54ca
NSX: Pass NSX uuid when plugging l2 gw attachment

The code passed the neutron network identifier.
This is no longer valid as identifiers on the backend are not
anymore the same as neutron identifiers.

Also, this would have hardly worked with networks on extended
logical switches.

Closes-Bug: 1285399
Change-Id: I6fe4d22d5b8d8b7dc3eb1cb3f47ad52ac1a2b565
NSX: port status must reflect fabric, not link status

This patch ensures the status attribute for the port resource is
semantically consistent with the reference plugin when using the
NSX plugin.

Change-Id: Ifb9c7664da926d3e6d5c6ec7c0e375b53a97582a
Closes-Bug: 1285426
Imported Translations from Transifex

Change-Id: If3e28d9e7df1d526e4bce2dfc01c6241b2115e72
Merge "Fix NSX migration path"
Merge "Imported Translations from Transifex"
Merge "NSX: Pass NSX uuid when plugging l2 gw attachment"
Merge "NSX: port status must reflect fabric, not link status"
Merge "Handle racing condition in OFC port deletion"