Update all `should`-style syntax to `expect` in features

features/steps/admin/applications.rb

features/steps/admin/broadcast_messages.rb

features/steps/admin/deploy_keys.rb

features/steps/admin/groups.rb

features/steps/admin/logs.rb

features/steps/admin/projects.rb

features/steps/admin/settings.rb

features/steps/admin/users.rb

features/steps/dashboard/archived_projects.rb

features/steps/dashboard/dashboard.rb

features/steps/dashboard/event_filters.rb

features/steps/dashboard/group.rb

features/steps/dashboard/help.rb

features/steps/dashboard/issues.rb

features/steps/dashboard/merge_requests.rb

features/steps/dashboard/new_project.rb

features/steps/dashboard/starred_projects.rb

features/steps/explore/groups.rb

features/steps/explore/projects.rb

features/steps/groups.rb