Add documentation publish jobs to Blazar
Add documentation publish jobs to Blazar

Since Blazar was approved as an official project [1], this patch adds
the publish-openstack-sphinx-docs and release-notes-jobs to the Blazar
project setting.

[1] https://review.openstack.org/#/c/482860/

Change-Id: I78475de0e52270c9a0410017a136a80b1a599561
Partial-Bug: #1721489

openstack-infra/project-config,openstack-infra/project-config