Fix update hang.

Don't check ssh keys of VM (attempting to update them) if we are
changing the state of the host (up/down) as there is a good chance
it will be down and will never return any keys.

Signed-off-by: Sandon Van Ness <sandon@inktank.com>
I completely forgot about this PR, I'm sorry. @SandonV can you just add a comment to the block with something like "Unless we are doing a simple status update, update the key" ?