Implements provider network support in PLUMgrid plugin

Includes the provider network extension in PLUMgrid plugin
PLUMgrid drivers are updated with the new extension data
Unit tests are added

Change-Id: Ia7fc011c04d143bdb7fd8f67768a2076be8c5264
Implements: blueprint provider-network-plumgrid
BigSwitch: Fix tenant_id for shared net requests

The URI port requests are sent to on the backend
contains the tenant_id of the network. This corrects
a bug where, on port updates and deletes, the tenant_id
of the port rather than the network was being used,
which was incorrect when attached to a shared network.

Closes-Bug: #1278530
Change-Id: I09ffc767c669416555867e975d0b7057a5cfa0cb
Sync oslo cache with oslo-incubator

Due to removal of py3kcompat we need to sync with
oslo-incubator in order to use six package directly.

Related-Bug: #1276440
Change-Id: Ib3d1c9e09497f7ecd7495ef0f70c6105c14a9783
Support Port Binding Extension in Cisco N1kv plugin

Change-Id: I9bcacb2b1f1bb1500b9176a49736aac128938de8
Closes-Bug: #1272128
tests/service: consolidate setUp/tearDown logic

Consolidate the duplicate code for extension api tests.
This will be also used by servicevm extensions later.

At the same time, a bug in test_extension_firewall.py is also fixed.
double call of super().setUp().

Closes-bug: #1275654
Change-Id: I72f185ef6e5af55729ced51fc0b72fae799d46ac
l2-population : send flooding entries when the last port goes down

Delete port used to call update_port_down to calculate
its fdb entries during delete_port_precommit. But during
the pre-commit, the port is still up, so update_port_down
acts as if there was still one port on the agent, and
doesn't add flooding entry in its fdb_entries.

Closes bug #1282141

Change-Id: Icedd02f33d999200505950beb9169ae3634e551b
Imported Translations from Transifex

Change-Id: I69ef916bdf23529a175aa94b761f6f29f00b71d8
stats table needs columns to be bigint

Bandwidth measurements trivially overrun 32bit counters.  Change storage
type to BigInteger from Integer.

Closes-Bug: #1284314
Change-Id: I20db25f374de66b8443ff50bac979bff634d8a14
Signed-off-by: Stephen Gran <stephen.gran@guardian.co.uk>
Merge "Imported Translations from Transifex"
Merge "Support Port Binding Extension in Cisco N1kv plugin"
Merge "Sync oslo cache with oslo-incubator"
Merge "stats table needs columns to be bigint"
Merge "l2-population : send flooding entries when the last port goes down"
Merge "BigSwitch: Fix tenant_id for shared net requests"
Merge "tests/service: consolidate setUp/tearDown logic"
DB Mappings for NSX security groups

This patch introduces DB mappings between neutron security
groups and NSX security profiles, thus not requiring anymore
the Neutron router ID to be equal to the NSX one.

This change is needed for enabling asynchronous operations in
the NSX plugin.

Related to blueprint nvp-async-backend-communication

Change-Id: I3b28d535c93cd2bfc776aabe0d99be18fce4454d
Merge "Implements provider network support in PLUMgrid plugin"