Add notification support to Ironic
Add notification support to Ironic

Ironic has a need for inter-service notifications. Near real-time
inter-service notifications in OpenStack have a variety of use cases.
Some of the use cases discussed for ironic included integration with
billing systems, using notifications to support an operations panel to
keep track of potential failures, and integration with TripleO. This
specification outlines a general framework for a notification schema in
ironic.

Change-Id: I67b1e2a815cd865792fba44362d94d272f69efcd

openstack/ironic-specs,bcornec/ironic-specs,NaohiroTamura/ironic-specs