* Update default roles for kube-agent chart in guides/documentation to be 'kube,app,discovery'
We want users to not have problems with feature discovery of Kuberentes app discovery,
so we're making sure by default our guides tell users to enable it.
* Add missing backslash
* Add enabling of App and Discovery roles when generating token for Kube
We want users to not have problems with enabling Kuberneetes App discovery by default.
* Add test checking that we provide correct '--set roles' text in command print out.
Hugo Shaka