Catch NoResultFound in _get_policy_profile_by_name

Add try-except in _get_policy_profile_by_name to raise
proper PolicyProfileNameNotFound if profile not found in
database.

Also unittest is added.

Closes-bug: #1393399

Change-Id: I3ab50a6870ff77a95e0977c75255e9cbd7286fbb
Eliminate unnecessary indirection in L3 agent

These indirections serve no useful purpose.  Normally, I wouldn't
bother to change them but these make other refactoring efforts a bit
more of a pain.

Change-Id: Ia73c93eb2eaa81d5772b3e0178fdf18f0c275b4c
Fix context.elevated

The current version of elevated method sets for the original context
the admin role too. This change fix this.

Added unittest.

Closes-bug: #1386932

Change-Id: Ife881112efa151e53bfa4b7af35643dcf2d1114f
Drop RpcProxy usage from bigswitch plugin

This patch drops the usage of the RpcProxy compatibility class from
the bigswitch plugin.  The equivalent usage of oslo.messaging APIs is
now used instead.

Note that there is one very minor functional change included.  The
previous code set the base version to '1.1'.  It should be '1.0'.  The
proper pattern to use is to set the base version on the client side to
be the initial version of the API (X.0).  Then, any methods that
require a newer version need to specify it.  In this case, verison
'1.1' was the security group methods, and those specify '1.1' as you
would expect.

Part of blueprint drop-rpc-compat.

Change-Id: I695d2a26db9c01b0be65b11cd4e4063567b5f20d
Update i18n translation for linuxbridge log msg's

This patch set covers the linuxbridge directory under neutron/plugins.

Partial-Bug: #1320867
Change-Id: I603f9ae8f95bf1b1815edaca49e728fa378cf6ba
Imported Translations from Transifex

For more information about this automatic import see:
https://wiki.openstack.org/wiki/Translations/Infrastructure

Change-Id: I754cecc4efba2c9cd385de99901dce8c2188fce0
Test HA router failover

HA failover testing requires the ability for two L3 agents to
co-exist on the same machine. The following changes were made
to support this:

* Add l3 agent ability to simulate nested namespaces by suffixing
  each router namespace with '@host'. For example, if a router
  with id '1' is created, its namespace will be:
  'qrouter-1@host'
* Added test.common submodule which will hold common code which is
  shared between the different kind of tests (unit and funtional).
* Added tests.common.agents submodule which holds test-only agents, and
  added a test L3NAT agent to be used in the HA functional testings.

Co-Authored-By: Assaf Muller <amuller@redhat.com>
Closes-bug: #1374946
Change-Id: I2185fe276d9d32b34c407396e7ed5d6e2801340c
Merge "Drop RpcProxy usage from bigswitch plugin"
Merge "Test HA router failover"
Merge "Imported Translations from Transifex"
Merge "Fix context.elevated"
Merge "Catch NoResultFound in _get_policy_profile_by_name"
Merge "Eliminate unnecessary indirection in L3 agent"
Merge "Update i18n translation for linuxbridge log msg's"