Fix deprecation warnings in Keystone container

[Sebastian Kalinowski]

In Keystone container logs there are some deprecation warnings that should be addressed:

Warning: Scope(Class[Keystone::Endpoint]): The public_address parameter is deprecated, use public_url instead.
Warning: Scope(Class[Keystone::Endpoint]): The internal_address parameter is deprecated, use internal_url instead.
Warning: Scope(Class[Keystone::Endpoint]): The admin_address parameter is deprecated, use admin_url instead.
...
2014-11-13 12:00:23.871 662 WARNING keystone.openstack.common.versionutils [-] Deprecated: keystone.middleware.core.XmlBodyMiddleware is deprecated as of Icehouse in favor of support for "application/json" only and may be removed in Kilo.
2014-11-13 12:00:23.952 662 WARNING keystone.openstack.common.versionutils [-] Deprecated: keystone.contrib.revoke.backends.kvs is deprecated as of Juno in favor of keystone.contrib.revoke.backends.sql and may be removed in Kilo.
2014-11-13 12:01:15.310 670 WARNING keystone.openstack.common.versionutils [-] Deprecated: keystone.token.backends.sql.Token is deprecated as of Juno in favor of keystone.token.persistence.backends.sql.Token and may be removed in Kilo.
2014-11-13 12:06:17.896 672 WARNING keystone.openstack.common.versionutils [-] Deprecated: keystone.token.backends.sql.Token is deprecated as of Juno in favor of keystone.token.persistence.backends.sql.Token and may be removed in Kilo.
/usr/lib64/python2.6/site-packages/sqlalchemy/sql/default_comparator.py:35: SAWarning: The IN-predicate on "assignment.actor_id" was invoked with an empty sequence. This results in a contradiction, which nonetheless can be expensive to evaluate. Consider alternative strategies for improved performance.
  return o[0](self, self.expr, op, *(other + o[1:]), **kwargs)
2014-11-13 12:16:22.520 671 WARNING keystone.openstack.common.versionutils [-] Deprecated: keystone.token.backends.sql.Token is deprecated as of Juno in favor of keystone.token.persistence.backends.sql.Token and may be removed in Kilo.

[Mykola Grygoriev (mgrygoriev)]

There are no above deprecation warnings in Keystone container already.

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "7.0"
  openstack_version: "2014.2.2-7.0"
  api: "1.0"
  build_number: "44"
  build_id: "2015-07-16_10-46-35"
  nailgun_sha: "bb8b7ce29abf258e4a73d227f78bb07a56bc5199"
  python-fuelclient_sha: "fe14335efc3c800162b72d1e333e5179314e2ff4"
  fuel-agent_sha: "22b566f9161daab93bd3a3324307332e01925bb3"
  astute_sha: "3cc1bb6b2a7cc2b437c6c6ffc6366653b08749bf"
  fuel-library_sha: "36a02ee002f7071470d388089bfa95b14482d5bd"
  fuel-ostf_sha: "5b5ec07f15b1d15e452366e838c4c830010ee795"
  fuelmain_sha: "533d1722016da9774fb406f86d35942e5870ed73"