* Add GS180PEv3
I did something wrong with the previous pull request, so I created a new one for this. Appended with additional info.
No airflow as it's a passive switch. No u_height as it's a desktop 8 port poe switch which is not likely to be mounted in a rack.
* Update GS108PEv3.yaml
Fixed slug
Added passive airflow per comment from author
Fixed u_height
Fixed comment
Removed un-needed definitions
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Co-authored-by: Daniel W. Anner <daniel.anner@danstechsupport.com>
