Sync puppet module memcached to v2.5.0 from upstream

v.2.5.0 sha1: 5a6c247a757671094d477d07c14b59c484d560d4
Implements: blueprint merge-openstack-puppet-modules

Change-Id: I0f5dbe3b178d8805a92eadfe6516e467bc05abb3
Merge "Sync puppet module memcached to v2.5.0 from upstream"