* Tests: Bump npm to v6 on travis & appveyor to make npm i faster [Thodoris Greasidis]
* Tests: Batch device tests re-creating a multicontainer app [Thodoris Greasidis]
* Tests: Batch tag test cases, to make them faster [Thodoris Greasidis]
* Fix envvar getAllByX tests throwing on missing envvars [Thodoris Greasidis]
* Tests: Batch test case states, to make the tests faster [Thodoris Greasidis]