Store events in Ceilometer
Store events in Ceilometer

Adds an option to toggle whether events are stored in Ceilometer.

The default is false and remains unchanged.

Change-Id: I9accb679b97cf7172c67f3cd5f218bdaee507c94
Related-Bug: rhbz#1312373

trozet/opnfv-tht,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,bcrochet/tripleo-heat-templates,bcrochet/tripleo-heat-templates,bcrochet/tripleo-heat-templates,trozet/opnfv-tht,trozet/opnfv-tht