Fix failing import in juju master namespace actions.

cluster/juju/layers/kubernetes-master/actions/create-rbd-pv

@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from charms.templating.jinja2 import render
+from charmhelpers.core.templating import render
 from charms.reactive import is_state
 from charmhelpers.core.hookenv import action_get
 from charmhelpers.core.hookenv import action_set

cluster/juju/layers/kubernetes-master/actions/namespace-create

@@ -7,7 +7,7 @@ from charmhelpers.core.hookenv import (
     action_fail,
     action_name
 )
-from charms.templating.jinja2 import render
+from charmhelpers.core.templating import render
 from subprocess import check_output