Previously it was looping, waiting for FINISHED|FAILED but was not
actually failing the test if the compose failed to build.
This adds a function to check the status of the compose and calls it
after each compose.
(cherry picked from commit d0e947fe3b)
Related: rhbz#1724073
The root account checks are applied to generated and deployed images
to make sure that root account is locked, except for live ISO.
Related: rhbz#1626122
