The function is meant to replace the duplicate pieces of code used in various
tests, the polling interval is unified to 20 seconds.
Cherry-picked from 836f0ddf
Related: rhbz#1770193
- verify SemVer .patch number will be automatically updated when
we push the blueprint a second time without changing version
- verify show displays the content in TOML format and it matches
what is on disk. Because of that also start with empty packages
and groups fields in the initial toml. If they are missing they
will be added automatically by lorax-composer and this simplifies
the test
- verify delete works
Related: rhbz#1698366
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#1687595
