Add mailing list for OpenStack Ambassadors

Currently, OpenStack Ambassadors are conducting any private communications
using a massive list of CCs. While most communications should happen
directly with the community, and on the community mailing list, this new
private mailing list will faciliate internal discussions on sensitive
topics.

Change-Id: I46122c9d688f66e910a47e7b26a73bca4cefc28b
Upload pre-release oslo.messaging tags to pypi

oslo.messaging is not yet ready to tag a non-beta version of the
library, but that shouldn't stop us using pypi in place of tarballs
via 'pip install -f' because uploading beta releases to pypi won't
affect any existing users since there aren't any.

In future, there will be a job for uploading beta versions as wheels
to prevent older versions of pip thinking they are non-beta versions.
Once that job is in place, we can switch to using it.

When it comes time to release a non-beta version of oslo.messaging,
we'll need to move back the pypi-upload job to the release pipeline
and disable it on the pre-release pipeline.

Change-Id: I87eaefb37fa52142d47b4aba4f3f76452771f74e
Remove incorrect name filters from nodepool config

* modules/openstack_project/templates/nodepool/nodepool.yaml.erb:
Additional "performance" name-filter entries are removed from
providers where they are meaningless. With these in place, nodepool
was unable to find an appropriate flavor to build the associated
images.

Change-Id: Ie05dd9c9e884a1ffcf73596399f19b6e67d07f4e
Merge "Upload pre-release oslo.messaging tags to pypi"
add in elastic-recheck-unclassified report

this adds the new elastic-recheck-unclassified report, which
generates an html page of all the unclassified gate failures.

it also runs this command, and the elastic-recheck-graph command
not only on cron, but also on updates to the repository. In order
to do this safely, we create a new er_safe_run.sh in /usr/local
that provides a flock front end to ensure we won't race on our
html writes.

Change-Id: I624f2629e2ac19a1394866f73f1aa9ba18e968ce
Add three new jenkins servers

Change-Id: I1143c1c7446890c47be12d8b115560bddadc1919
Add a fedora image definition for tripleo-cloud

So we can run tests on Fedora too.

Change-Id: I2ed81f747664e6e960feda47d7745362a8b0a557
Merge "Remove incorrect name filters from nodepool config"
Merge "add in elastic-recheck-unclassified report"
Merge "Add a fedora image definition for tripleo-cloud"
Merge "Add mailing list for OpenStack Ambassadors"
Zuul gate window increment by 2, floor at 6

* modules/openstack_project/files/zuul/layout.yaml: Be more
optimistic overall with the gate window, increasing by 2 instead of
1 on successes and never falling below 6. This will allow us to
utilize more available test node quota, hopefully still without
falling into another starvation scenario.

Change-Id: I6d54c0a8bd0575d0c5a85ee93bd5af77534ff2bf
Increase zuul window floor to 10

Change-Id: I606b1e42381ad1a4be674b6f038f631c82807ecc