Added ceilometer compute agent support.

Added support for ceilometer compute agent. Fixed datbase endpoint.
Merge pull request #2 from hogepodge/ceilometer_agent

Added ceilometer compute agent support.
Fixed keystone roles. Added mongodb database/user

Before this change, the default member role did not match the
Keystone defaults. A user and database were not created
for MongoDB and Ceilometer. This change corrects the member
role and adds the MongoDB database and user.
Merge pull request #3 from hogepodge/user_cleanup

Fixed keystone roles. Added mongodb database/user