* Let authentication dump test execute the dump under authentication as well.
* Added a test for active-failover to ensure users are kept during failover scenarios
* Added temporary rights for Admin users on dump and restore for indexes and inventory.
* Updated changelog
* Added a test for replication of _users in single-server replication case
* Added a regression test in replication that validates users are replicated under authentication
* Execute replication ongoing tests under authentication
* improve error reporting in RestAqlHandler
* added logging about indexes
* added some safety checks to the logger
* slighty better error messages
* fix location header for SSL
* fix error message
* try to make tests more deterministic
* change error code from TRI_ERROR_INTERNAL (which we want to avoid) to TRI_ERROR_FAILED