This change fixes the following lint errors discovered since we removed
pin of lint packages.
manifests/api.pp:281:WARNING: class included by absolute name
(::$class)
manifests/init.pp:33:WARNING: class included by absolute name
(::$class)
manifests/keystone/auth.pp:79:WARNING: class included by absolute name
(::$class)
manifests/metadata.pp:93:WARNING: class included by absolute name
(::$class)
Change-Id: I5bb85e2e17bcbf4761e9ab765706e3ce070c675e
443bcebe4b