Squad

This 1.39 release makes known issues test names be parsed as
regular expressions so that users can specify known issues
as "ltp-*/flawed-test*name", instead of specifying each
as a separate known issue.

Complete list of changes going in:

* core: tasks: add support for patterns in known issue test_name

This 1.38 release fixes two major bugs in SQUAD when communicating
with LAVA backends:

1. When a testjob fails to fetch, and LAVA lab is out,
SQUAD should handle the outage an give up trying to
fetch such jobs.
2. When LAVA jobs fail due to "metadata is too large",
the results api won't return a valid metadata field,
thus causing SQUAD to break on that too

Also this release includes a health-check endpoint that
shows the availability of most of SQUAD's services.

Complete list of changes going in:

* Dockerfile: add suport to django-health-check
* Dockerfile: fix django-storage error on closing s3 file
* ci: backend: lava: handle null error_msg
* ci: backend: lava: raise TemporaryFetchIssue on fetch timeout
* frontend: build-nav: add test summary to build header
* frontend: project_settings: gather local options
* health_check: allow health-check endpoint to staff user only
* setup.cfg: ignore "C101 Coding magic comment not found" flake8 errors
* travis: disable testing on real LAVA

This 1.37.1 release is a bug fix release. It fixes a bug that shows
the "Callbacks" tab in builds with no callbacks and also fixes
a bug in the listener process that wasn't restarting dead processes.

Complete list of changes going in:

* frontend: build-nav: fix callbacks count check
* ci: listen: restart dead processes

This 1.37 release adds a couple of new features:
- an option to allow builds to finish on notification timeout
- allow disabling environments, by setting -1 to the "expected number of testruns"
- attempts to make notifications not timeout
- add 'important metadata keys'
- display build callbacks, if any

Complete list of changes going in:

* api: ci: disable and environment for receiving new submissions
* core:
* models: add flag to allow forcing builds to finish
* models: make callback response_content larger than 1024
* notification: use fase TestComparison
* frontent:
* build_callbacks: add callbacks to the Build view
* group_settings: avoid timeout deleting groups
* project_settings: add important-metadata-keys
* project_settings: add option to force finishing builds
* project_settings: add help text disabling environment
* doc: conf: update copyrights year
* test: core: test_tasks_notification: skip test for sqlite

This 1.36.1 release fixes a bug when api clients tried to save project_settings
but got their data discarted by the rest framework.

Complete list of changes going in:

* api: rest: make project_settings write only

This 1.36 release allow running build comparison against unfinished builds