* 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
