Add ceilometer support about mysql configuration

This patch is aim to add ceilometer db configuration
support in openstack::db::mysql.

Fixes bug #1222421

Change-Id: Idc5071e58d76d7d3fd97cfeaadd5448598f87467
Merge "Add ceilometer support about mysql configuration"
Merge git://github.com/puppetlabs/puppetlabs-openstack