ARM: Add management lock commands

[vivsriaus]

[mayurid]

Vivek Srinivasan (@vivsriaus) : This is for post-connect. Let us know if you disagree.

[brendandburns]

Is this still an active work stream? I can add support for this if no one is working on it.

[vivsriaus]

Brendan Burns (@brendandburns) Yes, lock commands are still pending. I'd check with Yugang Wang (@yugangw-msft) and Mayuri Diwan (@mayurid) to ensure they're not already working on it, to ensure no overlap. Thanks!

[yugangw-msft]

Vivek Srinivasan (@vivsriaus), we are not working on it, and contributions are very much welcome

[brendandburns]

ok, I'll add this to my todo list.

[brendandburns]

Yugang Wang (@yugangw-msft) if you add me as a maintainer I can assign issues to myself :)