[Linaro-validation] time to move away from conmux?

Hi,

After the last few days of poking at things, I think it's time to finally move fully away from conmux to a connection_command / hard_reset_command based approach.

I think the actual config file mangling can be done with a short shell script. Although lava-core will fix this properly, I can spend a quick 10 minutes hacking up lava console and lava powerstab commands to get around the loss of easy conmux-console based command lines.

Thoughts?

Cheers, mwh