correct templated catalog driver class

Now the templated catalog driver class "TemplatedCatalog" is removed
in this patch https://review.openstack.org/#/c/125708/2 use
"keystone.catalog.backends.templated.Catalog" instead.

Change-Id: Ib9c8ea557e7171ff0c78a1e10d752ed564aff9e7
Closes-Bug: #1386562
diff --git a/lib/keystone b/lib/keystone
index 1c67835..276e971 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -287,7 +287,7 @@
         " -i $KEYSTONE_CATALOG
 
         # Configure ``keystone.conf`` to use templates
-        iniset $KEYSTONE_CONF catalog driver "keystone.catalog.backends.templated.TemplatedCatalog"
+        iniset $KEYSTONE_CONF catalog driver "keystone.catalog.backends.templated.Catalog"
         iniset $KEYSTONE_CONF catalog template_file "$KEYSTONE_CATALOG"
     fi