refactor: use r'' notation for regular expressions
refactor: use r'' notation for regular expressions

This gets rid of DeprecationWarnings.

Change-Id: I57e6a70eaaef1b8a98dbb46cde4a3bc6317b338e

redhat-openstack/rdopkg,redhat-openstack/rdopkg,openstack-packages/rdopkg,openstack-packages/rdopkg