Fix update hang.
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 <a38d61b815b8053a15c463c80449b5c080334ec7@inktank.com>

michaelsevilla/teuthology,zhouyuan/teuthology,ivotron/teuthology,tchaikov/teuthology,robbat2/teuthology,dmick/teuthology,michaelsevilla/teuthology,dreamhost/teuthology,ceph/teuthology,zhouyuan/teuthology,yghannam/teuthology,dmick/teuthology,SUSE/teuthology,ktdreyer/teuthology,ceph/teuthology,robbat2/teuthology,t-miyamae/teuthology,ivotron/teuthology,dreamhost/teuthology,yghannam/teuthology,caibo2014/teuthology,ktdreyer/teuthology,tchaikov/teuthology,caibo2014/teuthology,t-miyamae/teuthology,dmick/teuthology,SUSE/teuthology,SUSE/teuthology