
This patch aims to add a prefix for memcached_server on each role to give the ability for deployers to override the location of memcached cluster. I.e users wants to create a single memcached cluster with k8s for each service. We also add pymemcache based on [1] [1] https://review.opendev.org/711429 Change-Id: I5ce2be9e7a8a648cbb734a2e418d434e7991e298