Renaming PM to POL

Updated all the references from PM to POL.

Change-Id: I5d8c228bfa5498d810eb98d55d9f30a681a2730d
Signed-off-by: Eduardo Sousa <esousa@whitestack.com>
diff --git a/docker/Makefile b/docker/Makefile
index 0dcb3df..6e6ae57 100644
--- a/docker/Makefile
+++ b/docker/Makefile
@@ -13,5 +13,5 @@
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 #
-SUBDIRS = MON NBI osmclient RO LCM light-ui pm Keystone
+SUBDIRS = MON NBI osmclient RO LCM light-ui POL Keystone
 include mk/dirs.mk