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: I981f020757eb01b53fda0bf72c7be3f414edfac8
Implements: blueprint clean-up-attr-for-mq-and-db