Update ceilometer config

 - use mongodb class to install (requires [1])
 - fix database connection string for mongodb
 - use qpid for rpc backend

[1] https://review.openstack.org/#/c/43245/
Puppet heat deployment

Initial puppet heat deployment for firestack.
Merge pull request #47 from ianw/puppet-heat

Puppet heat
Merge pull request #48 from ianw/puppet-ceilometer

Update ceilometer puppet deployment