* master: (51 commits)
  Fix spec/features/admin/admin_active_tab_spec.rb
  Fix eslint errors
  Don't open Asciidoc module twice
  Add `gitlab_rails['auto_migrate'] = false` to HA docs for Redis/PG [ci skip]
  Unify margin widths
  Add $CI_ENVIRONMENT_NAME and $CI_ENVIRONMENT_SLUG
  Add Okta authentication documentation
  Create environments when the build referencing them is created
  Add an environment slug
  Make the index on environment name and project id unique, fixing up any duplicates
  Rename `issue create` slash command to `issue new`
  Add changelog for !7850.
  Update Mattermost slash commands docs to explain how to create a newline and use <kbd> for user input. See HTML5 spec: https://www.w3.org/TR/html5/text-level-semantics.html#the-kbd-element
  Improve `issue create …` slash command with user input keys to create a newline in chat clients.
  Add explicit status test, feedback:
  Don't call anything on a block, use simple if
  Use described_class and update description
  Also use latest_status, feedback:
  Fixed bug with +1 not autocompleting
  added changelog entry
  ...