Start openvswitch-switch early in upstart

When there is a bridge configuration in the interfaces definition the
openvswitch-switch service needs to be started early.

This ensures that the metadata server is available for cloud-init when
it runs.

Change-Id: Ieac3703dc910ccb420e1a5a1cdc40105bd4f067a
Closes-bug: #1314573
Update to use flavor_extra_specs.

Nova recently dropped the deprecated instance_type_extra_specs
config option. This commit updates our TripleO nova.conf
config to use the new format.

Closes-bug #1330735

Change-Id: I4b35b98be789d689a95c363790ff2bdd548eae10
Merge "Update to use flavor_extra_specs."
Merge "Start openvswitch-switch early in upstart"