* Refactor: renames uuid to id

* Refactor: misc renames

* Refactor: fixes renaming of variable

* Refactor: changes method accessed by templateSrv

* Refactor: fixes for NEW_VARIABLE_ID

* Refactor: rename flow refactor

* Tests: adds missing reducer and action tests

* Refactor: keeping tests consitent

* Chore: reorder imports

* Chore: removes uuid package

* Refactor: fixes imports