* Karma to Jest: datasource_srv

* Sort function differs between Karma and Jest

* Fix error based on .sort() implementation

* Remove Karma test

* alerting: only log when screenshot been uploaded

* Remove comments

* Karma to Jest: datasource_srv

* Sort function differs between Karma and Jest

* Fix error based on .sort() implementation

* Remove Karma test

* Remove comments

* Remove console.log

* Remove console.log

* Change sorting and add test for default data source