Fixes #19789 - fix Layout/SpaceAroundOperators cop

Fixes #23377 - audit external group membership changes (#5555)

Fixes #19781 - Fix Layout/LeadingCommentSpace cop

Fixes #23106 - Fix MySQL tests

Fixes #23106 - Port robottelo tests for usergroups

Fixes #19832 - Fix Rails/FindBy cop

Fixes #23123 - Fix Rails/ActiveRecordAliases cop

Fixes #22199 - Audit has_many associations (#5187)

Refs #22164 - use cheaper FactoryBot methods

• Refs #22164 - FactoryBot.build -> FactoryBot.build_stubbed

• Refs #22164 - FactoryBot.create -> FactoryBot.build

in
- test/unit/*
- test/models/shared/taxonomies_base_test.rb
- test/controllers/hosts_controller_test.rb

Fixes #21502 - Disable editing users in group with EUG (#4962)

Adding Users to User Groups with External User Groups does not
work. Currently the only feedback the user gets is that Users get
automatically removed after the form is submitted - no warning or...

Fixes #21424 - use factory_bot_rails

fixes #19344 - sort both expected and actual results in UG test

Sorting of the actual value is by name (`Host::Managed#<=>`), but the
expected value was sorted by ID (order of creation). Expected/actual
arguments are swapped to correct order.

fixes #18476 - users have ssh keys

fixes #16557 - move tests into modern Rails layout

Models, controllers, mailers and helpers are now in test/ subdirs
matching app/ subdirs. Service, miscellaneous and old test/lib/ tests
are now in test/unit/ separated from models, which obsoletes the custom...