Users can unlink Group SAML from accounts page

Closes #5016

See merge request gitlab-org/gitlab-ee!8682

EE: Automatically merge CE master into EE master

See merge request gitlab-org/gitlab-ee!8657

CE upstream - 2018-12-04 12:21 UTC

See merge request gitlab-org/gitlab-ee!8693

Add new service to create the web ide terminal

See merge request gitlab-org/gitlab-ee!8549

This updates the documentation of automatic CE to EE merges to cover the
new automatic merging setup.

This sets up GitLab CI to automatically push CE master changes into EE
master, or revert them if the changes cause merge conflicts. The CI
configuration contains a single job to do this: `merge:master`. This job
is executed for every push to master, and periodically using a CI
schedule.

The periodic job is necessary because incremental jobs may not be able
to revert commits if newly added commits depend on these commits. By
re-running the job periodically (including all changes since a large
enough time frame), we can ensure that such commits are also reverted
(if they still conflict at that time).

The job runs in its own "merge" stage, _after_ the build and prepare
stages, but _before_ running the tests. This ensures that randomly
failing tests won't prevent code from being merged into EE. Running the
stage after the "prepare" stage reduces the chances of the job reverting
CE changes just because it ran before a corresponding EE MR was merged
into EE master.

Fix EE load balancing crashing on Rails 5

Closes #8692

See merge request gitlab-org/gitlab-ee!8687

Changes to the :group_saml trait were previously breaking
the ee-specific-lines check.

Previously we used @user, but this changed to local_assigns[:user]
so we could pass a second variable to the view from an EE module

Since we were already using current_user librally there it makes sense
to replace the remaining usages.

See: https://docs.gitlab.com/ee/development/module_with_instance_variables.html

Allows users to unlink their Group SAML accounts.
Needed so that users can decide when they no longer want to
allow an organization to log them into GitLab.com

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/5016

Handle null start or due dates for dates sourcing milestone in Epics

Closes #8700

See merge request gitlab-org/gitlab-ee!8689

# Conflicts:
#	lib/gitlab/checks/base_checker.rb
#	lib/gitlab/checks/change_access.rb
#	lib/gitlab/checks/diff_check.rb

[ci skip]

Resolve "Add usage ping for Package Management"

Closes #8320

See merge request gitlab-org/gitlab-ee!8641

CE port Refactor Gitlab::Checks::ChangeAccess class

See merge request gitlab-org/gitlab-ce!23533

Refactor Gitlab::Checks::ChangeAccess class

See merge request gitlab-org/gitlab-ee!8464

CE upstream - 2018-12-04 10:23 UTC

See merge request gitlab-org/gitlab-ee!8690

Fallback to admin KUBE_TOKEN for project clusters only

See merge request gitlab-org/gitlab-ce!23527

Resolve "Group-level project templates: Mini renaming"

Closes #8637

See merge request gitlab-org/gitlab-ee!8688

Fix collapsing discussion replies

Closes #54646

See merge request gitlab-org/gitlab-ce!23462

CE upstream - 2018-12-04 00:21 UTC

Closes gitlab-ce#45992

See merge request gitlab-org/gitlab-ee!8686

This class handles the validations of git pushes. It is
quite big and all the logic is inside one file. This commit
refactors the code and split it into different files.

Revert "Merge branch 'auto-devops-support-for-group-security-dashboard' into 'master'"

See merge request gitlab-org/gitlab-ce!23530

CE Port2 of "Add empty and disabled web terminal tab"

See merge request gitlab-org/gitlab-ce!23509

Add empty and disabled web terminal tab

See merge request gitlab-org/gitlab-ee!8665

Update -font-size variable name

See merge request gitlab-org/gitlab-ce!23519

Disable format determination based on path extension

Closes #54278

See merge request gitlab-org/gitlab-ce!23454

Make docs about expect_next_instance_of consistent

See merge request gitlab-org/gitlab-ce!23507

This reverts merge request !23165

Approximate table counts based on TABLESAMPLE

See merge request gitlab-org/gitlab-ce!22650