Updated the olm client to process config vars from cli,env,file in or…

[gk1]

…der of precedence and persist them to file

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Description

How to test?

[oschwartz10612]

LGTM its so much cleaner now thank you! 🤩

I changed it to not overwrite based on the websocket config file. I plan to remove that from newt so it wont conflict. I also changed the mtu to be handled as an int which means we dont have 2 mtu vals.