Adding initial outline of pgbouncer documentation

Closes omnibus-gitlab#2649

See merge request gitlab-org/gitlab-ee!5351

Make ee/spec/features/admin/admin_sends_notification_spec.rb more reliable

See merge request gitlab-org/gitlab-ee!5547

Unify app/assets/javascripts/clusters/components/application_row.vue with CE

See merge request gitlab-org/gitlab-ee!5545

reliable

Merge branch '5841-geo-basesyncservice-should-prune-the-geo-temporary-directory-before-fetching' into 'master'

Resolve "Geo: BaseSyncService should prune the @geo-temporary directory before fetching"

Closes #5841

See merge request gitlab-org/gitlab-ee!5543

Skip master for EE-specific check

See merge request gitlab-org/gitlab-ee!5542

* Add link to components in HA README
* Fix typo in pgbouncer page

master is a special case that CE master is not crafted toward
EE master, thus it could be ahead of EE master. In this case
we should compare with the merge-base, but that could make
the code unnecessarily complex and is not worth the effort.

Replace the `admin/emails.feature` spinach test with an rspec analog

See merge request gitlab-org/gitlab-ee!5513

Replace the `admin/push_rules.feature` spinach test with an rspec analog

See merge request gitlab-org/gitlab-ee!5512

Resolve "Create a new job to check that EE-specific lines are minimal"

Closes #5682

See merge request gitlab-org/gitlab-ee!5404

[Rails5] Fix `undefined method 'downcase'` errors in requests specs

See merge request gitlab-org/gitlab-ee!5510

Adds Omniauth Provider for Group SAML

See merge request gitlab-org/gitlab-ee!5509

Port of jr-33320-lfs-settings-interface to EE

See merge request gitlab-org/gitlab-ee!5533

* Fix typo
* Add note about restarting database
* Fix links to different sections

CE upstream - 2018-05-01 18:25 UTC

Closes #4922

See merge request gitlab-org/gitlab-ee!5535

* Consolidate settings down to bare minimum
* Fix typo with markdown

* Add some information on interacting with the administrative console
* Add some troubleshooting information

Add a first pass at notes about how to connect a standalone instance of
pbgouncer into GitLab

For gitlab-org/omnibus-gitlab#2649

# Conflicts:
#	app/helpers/auth_helper.rb
#	doc/api/discussions.md
#	lib/api/discussions.rb
#	spec/helpers/auth_helper_spec.rb
#	spec/requests/api/discussions_spec.rb

[ci skip]

Fix memory and performance issues in Karma test suite

Closes #45900 and #45806

See merge request gitlab-org/gitlab-ce!18658

Fix repository location in GitLab QA squash specs

See merge request gitlab-org/gitlab-ee!5528

Bump nokogiri to 1.8.2 in qa Gemfile

See merge request gitlab-org/gitlab-ce!18673

Use gitaly 0.96.2

See merge request gitlab-org/gitlab-ce!18670

CE upstream - 2018-05-01 00:27 UTC

See merge request gitlab-org/gitlab-ee!5524

Fix commit trailer rendering when Gravatar is disabled

Closes #45633

See merge request gitlab-org/gitlab-ce!18586