Annotate models

app/models/application_setting.rb

app/models/identity.rb

app/models/merge_request.rb

app/models/project.rb

app/models/project_services/bamboo_service.rb

app/models/project_services/teamcity_service.rb

app/models/protected_branch.rb

app/models/user.rb

spec/factories/merge_requests.rb

spec/factories/projects.rb

spec/models/application_setting_spec.rb

spec/models/merge_request_spec.rb

spec/models/project_spec.rb

spec/models/protected_branch_spec.rb

spec/models/user_spec.rb