* remove ceilometer-api and ceilometer-collector service
* use ceilometer-notification to publish message to proper backend
* remove useless ceilometer_database_type and ceilometer_event_type
variables
* sync event_definitions.yaml, event_pipeline.yaml and pipeline.yaml
file with upstream
Change-Id: Ib39053cb5f70bd11ee61d3f26d5b28accecd7190
Useful for upgrade etc., which is preferablly done serially.
Example usage: tools/kolla-ansible deploy OR tools/kolla-ansible upgrade
Closes-Bug: #1576708
DocImpact
Change-Id: I34b2e16f8ce53e472a4682a4738c4ac0f5abf00c