* Fix Calix OS definitions

The main change is EXA (E7, etc) and B6 (Occam) devices are now their own OS

Now the follow OS exist:
exa: E7 EXA, E5-400, E5-48, E3-48, E3-8G
occamos: B6

Unchanged:
calix: E5-1**, E3-12C
axos: E7-2 AXOS, E9-2, E3-2, E5-520, E5-16F, E3-16F, E5-30x

* fix tests
exa_e7-2 seems like bogus data.

* additional tests, fix an error in the yaml

* Remove extra line return

* Add missed file