Port of 32282-add-foreign-keys-to-todos to EE.

See merge request gitlab-org/gitlab-ee!4383

Port from CE https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16313

See merge request gitlab-org/gitlab-ee!4377

Client changes for Tag,BranchNamesContainingCommit

See merge request gitlab-org/gitlab-ee!4372

Port 42547 to EE

See merge request gitlab-org/gitlab-ee!4363

Ee persistent callouts

See merge request gitlab-org/gitlab-ee!4356

Report the correct version and revision for Geo node status requests

Closes #4782

See merge request gitlab-org/gitlab-ee!4353

Update Geo setup guide to not delete private keys ever, only replace them

See merge request gitlab-org/gitlab-ee!4381

Fix export removal for hashed-storage projects within a renamed or deleted namespace (EE)

Closes gitlab-ce#42270

See merge request gitlab-org/gitlab-ee!4382

Resolve "Duplicated uploads section in gitlab.yml.example"

Closes #4806

See merge request gitlab-org/gitlab-ee!4380

If you move those files and lose TCP connection you will never get access to the secondary node again
so let's just copy them instead ;)

Introduce EE::API::APIGuard::HelperMethods

See merge request gitlab-org/gitlab-ee!4378

[EE] Incorporate OperationService.UserSquash Gitaly RPC

See merge request gitlab-org/gitlab-ee!4367

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

Fix flay not detecting identical code

See merge request gitlab-org/gitlab-ee!4376

Fix N+1 queries with /api/v4/groups endpoint

See merge request gitlab-org/gitlab-ee!4371

EE: Track and act upon the number of executed SQL queries

See merge request gitlab-org/gitlab-ee!4255

CE upstream - 2018-02-02 18:24 UTC

See merge request gitlab-org/gitlab-ee!4366

Gem is updated from 2.8 to 2.10. [changelog][1]

[1]: https://github.com/seattlerb/flay/blob/master/History.rdoc

Previously the script checked only for 'Similar code', but flay will
tell users when IDENTICAL code is detected too. This should create a
commit will create a failing pipeline, and to check that it does this
commit is pushed.

Fixes #42628

As part of gitlab-org/gitaly#884, this commit contains the client
implementation for both TagNamesContaintingCommit and
BranchNamesContainingCommit. The interface in the Repository model stays
the same, but the implementation on the serverside, e.g. Gitaly, uses
`for-each-ref`, as opposed to `branch` or `tag` which both aren't
plumbing command. The result stays the same.

On the serverside, we have the opportunity to limit the number of names
to return. However, this is not supported on the front end yet. My
proposal to use this ability: gitlab-org/gitlab-ce#42581. For now, this
ability is not used as that would change more behaviours on a feature
flag which might lead to unexpected changes on page refresh for example.