In !5586, some `add_column` statements were moved between migrations.
If the original migrations were already run on a user's instance,
the new migrations would try to add the columns again.

Correct grammar in Use-cases section of Repository Mirroring docs

See merge request gitlab-org/gitlab-ee!5584

Resolve "Geo: Gitlab::Git::CommandError (13:exit status 128) when calculating checksums"

Closes #5750

See merge request gitlab-org/gitlab-ee!5486

CE upstream - 2018-05-08 00:16 UTC

Closes #5904, #5573, and #5857

See merge request gitlab-org/gitlab-ee!5608

There are two issues:

1. When a Wiki was disabled, the spec was still trying to create a
Wiki page, which would cause Gitaly to create the repository and fire
hooks. Since Rails isn't running an internal API server, this fails.

2. For private Wikis, the Wiki repository needs to be created with the
:wiki_repo trait in order to clear hooks to prevent Gitaly from
contacting the internal API server.

Merge branch '5926-getting-geo-secondary-database-is-not-configured-when-only-running-ee-sha_attribute' into 'master'

Getting "Geo secondary database is not configured" when only running EE (sha_attribute)

Closes #5926

See merge request gitlab-org/gitlab-ee!5614

Squash migrations from 2013

See merge request gitlab-org/gitlab-ee!5464

Add migration page for Gemnasium

Closes #5917

See merge request gitlab-org/gitlab-ee!5607

Resolve "ee-files-location-check "git status not clean" - it didn't ignore knapsack"

Closes #5912

See merge request gitlab-org/gitlab-ee!5604

Resolve "ee-specific-lines-check should take the old base one commit before the one we want"

Closes #5923

See merge request gitlab-org/gitlab-ee!5610

Don't create import_state until project is persisted

See merge request gitlab-org/gitlab-ee!5612

This is well explained in:
https://content.pivotal.io/blog/git-rebase-onto

Respect permissions when showing Failed Jobs (EE)

See merge request gitlab-org/gitlab-ee!5592

Running git log --full-history -- features/steps/project/builds.rb, you can
see that this was renamed to features/steps/project/builds/artifacts.rb in
2016 via bf7aac74. You can't see the actual changes in GitLab, but
they show up if you run git diff da866795..30e4d3ce.

Port to EE: Live trace: Use efficient destroy all (for `dependent: :destory` problem)

See merge request gitlab-org/gitlab-ee!5593

Allow to dismiss vulnerabilities in security reports

See merge request gitlab-org/gitlab-ee!5452

Update broadcast message notes for Geo

See merge request gitlab-org/gitlab-ee!5602

Resolve "Geo: enable housekeeping functionality when syncing repositories"

Closes #5717

See merge request gitlab-org/gitlab-ee!5461