Initial add of ceilometer recipes

These were migrated out of `openstack-compute` and into their
own cookbook.  This is an initial best-effort attempt.

Made the following changes, which differ from the recipes imported.
* Moved to openstack["metering"] attribute namespace.
* No longer performing source install.  This was done for folsom.
* No longer writing out an Apache virtualhost.  This was done to
  protect the folsom non-authenticated API endpoint.
* Templates write out as the ceilometer user/group vs nova.
* No longer including nova-common recipe.  It doesn't appear nova.conf
  is necessay (although I may be wrong).  The stackforge puppet manifests
  do not seem to do this [1].
* Added Strainerfile for testing.

  [1] https://github.com/stackforge/puppet-ceilometer).

bug 1187514
Change-Id: Ia97126e13e422037ad1f2c89debd9e4cdfa60b0a