For quite some time, OpenStack services have wanted to be able to send
messages to API end users (by user I do not mean the operator, but the
user that is interacting with the client).
This patch implements basic user messages with the following APIs.
GET /messages
GET /messages/<message_id>
DELETE /messages/<message_id>
Implements the basic /messages resource and tempest tests
The patch is aligned with related cinder patch where possible:
I8a635a07ed6ff93ccb71df8c404c927d1ecef005
DocImpact
APIImpact
Needed-By: I5ffb840a271c518f62ee1accfd8e20a97f45594d
Needed-By: I9ce096eebda3249687268e361b7141dea4032b57
Needed-By: Ic7d25a144905a39c56ababe8bd666b01bc0d0aef
Partially-implements: blueprint user-messages
Co-Authored-By: Jan Provaznik <jprovazn@redhat.com>
Change-Id: Ia0cc524e0bfb2ca5e495e575e17e9911c746690b
dd630c3929