Add majorpower majortel DC power system (librenms#18369)

* add majorpower majortel DC power system

* changes as requested:
* removed `mib:`
* changed OID format
* corrected duplicate OID

* updated test data

* Update mts-com.json

* Update OS module fields in mts-com.yaml

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Co-authored-by: Neil Lathwood <[email protected]>

Author: jakejakejakejakejakejake