* csconfig: drop redundant hub information on *Cfg structs
* rename validItemFileName() -> item.validPath()
* Methods on hub object
* updated tests to reduce need of csconfig.Config or global state
- updated logs and user messages
- added func tests for all the items: install, remove, upgrade, list
- rewritten taint tests for collections
- removed redundant csconfig.LoadPrometheus()
* removed unused error; comment
* rename loop variables
* happy path
* rename loop variables
* extract function, method
* log.Printf -> log.Infof
* tests -> testdata
from "go help test":
The go tool will ignore a directory named "testdata", making it available
to hold ancillary data needed by the tests.
* align tags
* extract function toEmoji
