In EE we redefine Environment#terminals, which makes it impossible to
use `allow_any_instance_of(Environment)` or
`expect_any_instance_of(Environment)`. Other approaches of stubbing
this class, such as by stubbing `new`, only result in spec failures.

To solve this issue, we add a simple `defined?(EE)` check in the tests
to change the thing that we are testing. This is rather obnoxious,
because it requires EE knowledge in CE, and can break if
`EE::Environment` is removed without updating CE. Unfortunately, it
appears to be the only solution we have apart from modifying these tests
in EE (which would cause merge conflicts).

Update documentation with note regarding restoring ssh host keys

See merge request gitlab-org/gitlab-ce!23392

Bump gitlab-shell to 8.4.3

See merge request gitlab-org/gitlab-ce!23429

Update Knative IP address docs

See merge request gitlab-org/gitlab-ce!23380

[11.5] Fix SSRF in project integrations

See merge request gitlab/gitlabhq!2611

[master] Resolve: "Provide email notification when a user changes their email address"

See merge request gitlab/gitlabhq!2587

[master] Resolve "Reflected XSS in OAuth Authorize window due to redirect_uri allowing arbitrary protocols"

See merge request gitlab/gitlabhq!2572

[master] Fix CRLF issue in UrlValidator

See merge request gitlab/gitlabhq!2627

[master] Resolve "Personal access token with only `read_user` scope can be used to authenticate any web request"

See merge request gitlab/gitlabhq!2583

[master]Fixed ability to comment on and edit/delete comments on locked or confidential issues

See merge request gitlab/gitlabhq!2612

[master] [pages] Possible symlink time of check to time of use race condition

Closes #2742

See merge request gitlab/gitlabhq!2638

[master] XSS in markdown following unrecognized HTML element

Closes #2732

See merge request gitlab/gitlabhq!2599

[master] Fix XSS in mermaid diagrams

See merge request gitlab/gitlabhq!2597

[master] Don't expose confidential information in commit message list

See merge request gitlab/gitlabhq!2626

[master] Resolve: Promoting a milestone is missing an authorization check

See merge request gitlab/gitlabhq!2598

[master] Do not follow redirects in prometheus service

See merge request gitlab/gitlabhq!2617

[master] Stored XSS for Environments

Closes #2727

See merge request gitlab/gitlabhq!2594

[master] Fixed read private group names

See merge request gitlab/gitlabhq!2589

[Master] Redact sensitive information on gitlab-workhorse log

See merge request gitlab/gitlabhq!2584

See https://gitlab.com/gitlab-org/gitlab-shell/blob/master/CHANGELOG

[master] Resolve: "Provide email notification when a user changes their email address"

See merge request gitlab/gitlabhq!2587

[master] Resolve "Reflected XSS in OAuth Authorize window due to redirect_uri allowing arbitrary protocols"

See merge request gitlab/gitlabhq!2572

Externalize strings from `/app/views/snippets`

See merge request gitlab-org/gitlab-ce!23351

Make add_reference cop accept a hash for :index

See merge request gitlab-org/gitlab-ce!23375

Bump GitLab Workhorse to 7.2.1

See merge request gitlab-org/gitlab-ce!23424

Force better alignment in tables

See merge request gitlab-org/gitlab-ce!23393

Include new and edit links in breadcrumb for project milestones, group milestones, and labels

Closes #43998

See merge request gitlab-org/gitlab-ce!18515

Improve detail of resolve conflict docs

See merge request gitlab-org/gitlab-ce!22927

[master] Fix CRLF issue in UrlValidator

See merge request gitlab/gitlabhq!2627

[master] Resolve "Personal access token with only `read_user` scope can be used to authenticate any web request"

See merge request gitlab/gitlabhq!2583

[master]Fixed ability to comment on and edit/delete comments on locked or confidential issues

See merge request gitlab/gitlabhq!2612

[master] [pages] Possible symlink time of check to time of use race condition

Closes #2742

See merge request gitlab/gitlabhq!2638

[master] XSS in markdown following unrecognized HTML element

Closes #2732

See merge request gitlab/gitlabhq!2599

[master] Fix XSS in mermaid diagrams

See merge request gitlab/gitlabhq!2597