Disable the TUI in rescue mode

Don't let the TUI run when in rescue mode.

Change-Id: Ie1f9d6fbd944cd9c86b7ae85e031477d7184f868
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=989811
Signed-off-by: Ryan Barry <rbarry@redhat.com>