* put all Eaton mibs in the same subdir (common dependencies on EATON-OIDS, avoid file duplicates)
* update all mibs (for which a more recent version was found)
* update relevant YAML-files, so mib_dir points at eaton/.
* eaton-ats: add definition, voltage, frequency and state
* eaton-ats: missing snmprec file
* fix some syntax error
* fix some syntax error, again
* exclude eaton-ats from eaton-mgeups definition
* change eaton-ats definition
* move state and output voltage to yaml syntax
* Update eaton-mgeups.yaml