This reverts commit 6ed691807d.
The meter_sink is actually required in pipeline.yaml and not in
event_pipline.yaml, and this is something that needs to be enabled
for newton and above as the ceilometer-collector is not the
dependancy for this.
Change-Id: Ie40a99281f1f60de7a409e1e3a2025a850a8a446
f046895cdb