Squad

This 1.30 release adds Build and Environment references to
the Test model as it would make a lot of SQUAD queries run
much faster and simpler, going around TestRuns. The latter
is still very needed for storing test run files and metadata.

This release also enables selecting which fields from api endpoints
to be serialized.

Complete list of changes going in:

* core: migrations: make transaction non-atomic
* core: test: add Build and Environment reference to Test
* api, rest: enable filtering specific fields

This 1.29 release stops logging backends faults as errors
and log as warnings instead. The intention is to error-log
only squad-related errors.

Complete list of changes going in:

* ci:
* lava: clear TestJob.failure in backend implementation
* tasks: submit: log message as warning instead of error

This is a hotfix when unauthenticated users try to
access project home.

Complete list of changes going in:

* squad: frontend: check whether user is logged when displaying subscriptions

This is a quick release to add an improvement of the command
that fixes squadplugins tests.

Complete list of changes going in:

* core: commands, rewrite command to fix tradefed

This 1.28 release starts using storage to provide
TestRun and Attachment files, deprecating the use
of the same fields in the DB. Future releases will
completely remove such fields and will help control
database growth on installations with lots of data.

The release also clears TestJob fetch failures after
a successful fetch. It also fixes a bug in the bell
icon in the project page that signals whether or not
a user is subscribed to that project.

Complete list of changes going in:

* api:
* rest: hide deprecated TestRun file fields
* rest: make build, project and suitemetadata listings faster
* ci:
* add started_at and ended_at fields to TestJob
* models: clear TestJob.falure on successful
* core:
* models: add save_files to TestRun
* models: delete files as TestRun and Attachment are deleted
* models: deprecate TestRun and Attachment storage database fields
* frontend: notification bug

This is a quick release to hide storage fields

Complete list of changes going in:

* api: rest: hide storage fields