Comment 1 for bug 1524927

Instead of::

    Package['keystone'] ~> Service['httpd']

we should use::

    Package['keystone'] ~> Class['::apache::service']

See http://eavesdrop.openstack.org/irclogs/%23tripleo/%23tripleo.2015-12-10.log.html#t2015-12-10T17:38:16 and later for the discussion about what this issue is and how it might be solved.