We removed the exception handling for Rugged errors in !16770, which
revealed that the licensee gem attempts to retrieve a license file
via Rugged in `refs/heads/master` by default. If that branch
did not exist, a Rugged::ReferenceError would be thrown.

There were two issues:

1. Not every project uses `master` as the default branch. This
change uses the head commit to identify the license.

2. Removing the exception handling caused repositories to fail
loading. We can safely catch and ignore any Rugged error because
this means we weren't able to load a license file.

Closes #43268

Make parent_id field integer/null value instead of string

See merge request gitlab-org/gitlab-ce!17085

Suppress git output when running QA as a non-default user

Closes gitlab-qa#157

See merge request gitlab-org/gitlab-ce!17006

Resolve "Track GCP Billing enabled project changes"

Closes #41722

See merge request gitlab-org/gitlab-ce!16962

Resolve "Environment with starting slash in name causes error"

Closes #39885

See merge request gitlab-org/gitlab-ce!17071

Merge branch '43240-external-tracker-issues-don-t-have-the-correct-closing-text-appended-to-mrs' into 'master'

Resolve "External tracker issues don't have the correct closing text appended to MRs"

Closes #1 et #43240

See merge request gitlab-org/gitlab-ce!17109

Update Process document with changes to the exception request process.

See merge request gitlab-org/gitlab-ce!17118

clarify what kind of feature flags we support

See merge request gitlab-org/gitlab-ce!17113

Before, this would:

1. Not use the correct reference for non-JIRA external trackers.
2. Append 'Closes ' if an external tracker was enabled, but no issue matched the
   branch name.

Fix a too strict array-matching expectation

See merge request gitlab-org/gitlab-ce!17093

Add clearer proofreader process to docs

See merge request gitlab-org/gitlab-ce!17103

Resolve "Build Is Red: Admin > Users > Impersonation Tokens token creation allows creation of a token"

Closes gitlab-ee#4914

See merge request gitlab-org/gitlab-ce!17102

Signed-off-by: Rémy Coutable <remy@rymai.me>

Change all occurrences of ApplicationHelper#avatar_icon to use a User object where possible

Closes #42800

See merge request gitlab-org/gitlab-ce!16976

Remove ignore_column :data from Event

Closes #38135

See merge request gitlab-org/gitlab-ce!17094

Change SQL for expired artifacts to use new ci_job_artifacts.expire_at

See merge request gitlab-org/gitlab-ce!16578

Respect description and visibility when creating project from template

Closes #42601

See merge request gitlab-org/gitlab-ce!16820

Resolve "Remove notification settings for groups and projects you were previously a member of"

Closes #42481

See merge request gitlab-org/gitlab-ce!16906

And use :migration tag to use deletion strategy, and to avoid caching tables, and to lock into a particular schema.

Attempting to fix intermittent spec errors `PG::UndefinedTable: ERROR:  relation "public.untracked_files_for_uploads" does not exist`.

QA with runner cloning the repo with a deploy key

Closes gitlab-qa#148

See merge request gitlab-org/gitlab-ce!16859

Allow including custom attributes in API responses

See merge request gitlab-org/gitlab-ce!16526

Add information about projects when searching in wiki_blobs, blobs, commits scopes

Closes #42934

See merge request gitlab-org/gitlab-ce!17095

Display a link to external issue tracker when enabled

Closes #37050

See merge request gitlab-org/gitlab-ce!17030

API: Get refs for a particular commit

Closes #18014

See merge request gitlab-org/gitlab-ce!15026

Add a security harness script

Closes #43220

See merge request gitlab-org/gitlab-ce!17097

Resolve "Diff file navigation shows renamed files as deleted"

Closes #42314

See merge request gitlab-org/gitlab-ce!17091

Update database_mysql.md to remove conflicting recommendation

See merge request gitlab-org/gitlab-ce!17101