Add support for auth_admin_prefix for auth_token

Add support for auth_admin_prefix in the keystone
auth_token configuration of quantum::server.

Change-Id: I3d46dd4313b02115f690157ea169a5eee0aba513
Creates external bridge before starting ovs agent

The agent is currently involved in a race condition
where br-ex is created after it, but will still be
created before the agent searches for it in cases
where the intermediate resources are resolved quickly.

The agent will terminate immediately if the bridge
is not found.

Change-Id: Ie93289ce156f5c1d76bae7616b573107d16dd6aa
Fixes: bug #1190117
Merge "Add support for auth_admin_prefix for auth_token"
fix ovs plugin to work with postgresql

Validation SQL connection string for postgres was wrong. Compare with
the code section below the patched line, where the correct value is used.

Change-Id: I5f4a221e69dc672b9935bb2104d297e76982b577
Merge branch 'dev' of https://github.com/gwdg/openstack-quantum-puppet into dev