Updated openstack/openstack
Project: openstack/ceilometer  8d3d84053fb3af4457c0ca3c4c326591ca13ab26

implement notification coordination

this patch enables coordination of notification agents by splitting
pipelines across agents. a single-worker agent is provided that
skips the overhead of IPC. a multi-worker agent is added that uses
internal queue to redirect samples to correct pipeline.

Implements: blueprint notification-coordination
Change-Id: If8503ee70217025106a188f40a6e4ea8c49a89f4