Updated openstack/openstack
Project: openstack/ceilometer  887e40150ddcda05dc129d4455452ac062951db8

Improving of configuration.rst

Adds description of [notification] configuration section that should be
added in ceilometer.conf to switch on storing of events.

Change-Id: Ib203bc5f29da9045f4afd315ab31de958fd95fac