Add auth check for DeleteConsumerGroup; Add permissions for owner (#232)
Add auth check for DeleteConsumerGroup; Add permissions for owner (#232)

* Add auth check for DeleteConsumerGroup; Add permissions for owner

* Fix lint issue

* Do not add permissions if auth subject is empty, which might happen when we bypass auth

* Fix an issue using wrong request object

* Check whether owner email same as current auth user

uber/cherami-server,uber/cherami-server