remove most parts of api v1
Make API authentication tests use API v2

API v1 has been removed.
Fix flash message design
Remove API v1 controllers
Add cuke
Fix success message for group membership update
Fix success message for group membership delete
Remove rsb API templates
Fix api/v2/projects/level_list
Merge pull request #1127 from opf/fix/3775_fix_group_success_messages

[FIX] 3775 fix group success messages
Fix copyright year in single file
adds routing spec for api/v2 level_list
updates changelog
Merge pull request #1124 from opf/feature/remove_api_v1

Remove API v1
disable async jobs in test env by default
remove superfluous disabling of async jobs
manipulating asynchronicity with Delayed::Worker.delay_jobs should work by now
little comment improvement