Openvswitch update_port should return updated port info

Found when I enabled test_extension_allowedaddress_pairs, where
test_create_port_removed_allowed_address_pairs would fail due to the
returned port still containing the original addresspair.  The cause is
ovs simply not updating the port info being returned.

This patch additionally enables test_extension_allowedaddress_pairs for
openvswitch.

Moved checks and updating into method similar to what we do for
extradhcpopts and security_groups.

Additionally, this required fixing is_address_pairs_attribute_updated() as
it was passing (non-hashable) dicts to utils.compare_elements.

Change-Id: Ic871fea68fb9fcc862b1fd5ae5fe7aec540e4a30
Partial-Bug: #1255150
Log configuration values for OVS agent

When other agents start up, they log the configuration values
to their logs.  This patch adds the same feature to the
Openvswitch agent.

Change-Id: I00bc82a3dafbd214a2ddbdf525dd4cc327838af9
Closes-bug: #1285962
Implement OpenFlow Agent mechanism driver

This adds ML2 mechanism driver controlling OpenFlow switches
and an agent using Ryu as OpenFlow Python library.
- An agent acts as an OpenFlow controller on each compute nodes.
- OpenFlow 1.3 (vendor agnostic unlike OVS extensions).

Implements: blueprint ryu-ml2-driver
Change-Id: I6a8168d24f911996639179d91c4da49151751057
Merge "Openvswitch update_port should return updated port info"
Imported Translations from Transifex

Change-Id: I6b0267b40434d3fecdb8e071874c1c2543b643b0
Remove vim line from db migartion template

This commit also empties __init__.py and removes vim
modelines in the db migration related codes.

Change-Id: I9f83109c5becb6cf7e2e6ad9ad8eb9af3d8e0972
Closes-Bug: #1286991
Merge "Implement OpenFlow Agent mechanism driver"
Merge "Remove vim line from db migartion template"
Merge "Log configuration values for OVS agent"
Merge "Imported Translations from Transifex"