Replace usage of qemu+ssh with ssh <command>
Replace usage of qemu+ssh with ssh <command>

qemu+ssh simply gives the user access to /var/run/libvirt/libvirt-sock
which we can't restrict with our command line filter. Instead we run
the virsh command on the remote host which is filtered by ci_commands.

Change-Id: Id5f7b6cd8f790b4e90ab81bde39fd034a9ab8d5b

rdo-management/tripleo,rdo-management/tripleo