* Initial draft
* Apply fixes from StyleCI
* Use CI on master branch too
* Pass correct argument to queued DB creators/deleters
* Apply fixes from StyleCI
* Remove new interface from MySQLDBManager
* Make phpunit run
* Apply fixes from StyleCI
* Fix static property
* Default databaseName
* Use database transactions for creating users & granting permissions
* Apply fixes from StyleCI
* Get old tests to pass
* Apply fixes from StyleCI
* Add tests for PermissionControlledMySQLDatabaseManager
* Apply fixes from StyleCI
* Write test for extra config, fix bug with extra config
* Apply fixes from StyleCI
* Add TenantDoesNotExist exception, fix queued migrator serialization
* wip
* Apply fixes from StyleCI
* Use only one config for queueing
* Apply fixes from StyleCI
* rename test
* rename test
* Add the option to set values & db name during tenant creation
* Apply fixes from StyleCI
* Add tests
* Apply fixes from StyleCI
* Rewrite conditional for clarity
* wip
* Add Predis support
* Enable phpredis extension only for some builds
* Add note about phpredis
* Fix if command
* Revert travis changes & add a version check to predis tests