Also:
* Use build-openstack-docs-pti job template for docs
* Use build-openstack-releasenotes job for release notes
(We can't use the OpenStack releasenotes template as it includes
publish jobs, stx needs its own)
* Add newnote tox environment as convenience for creating new release
notes, re-using the releasenotes venv.
* Create a release summary note.
* Remove the unused 'true' tox environment.
* Fix doc/build in .gitignore
Change-Id: Ibe9d298bcc76f023c0500038db55d8384f5ff731
Signed-off-by: Dean Troyer <dtroyer@gmail.com>
88ba4d5f22