Remove un-used base CLI command classes

Change-Id: I0f029e0d027e00f9f7e0f408d6161748e9c619a0
Commands should extend our Base Command, rather than cliff.Command

Change-Id: I42c8f1b95217964130aa5c77c21124f5f305ef9a
Show log level in moniker-manage output

Change-Id: Ie7db8e04620805e9e06f7bf0f2a7e9418b8f8ccd