Clean up cookbook for bp/clean-up-attr-for-mq-and-db

This change removes the attributes we'll be moving to openstack-common
and changes reference of those attributes to reflect new (more
consistent) namespace.

Change-Id: I5f324ed2494a643d27bb2922361e21f4a1ce2a1f
Implements: blueprint clean-up-attr-for-mq-and-db