Use constants so we won't have to edit a dozen places in the test when
the package versions are bumped.
(cherry picked from commit 6242ae8b18)
Related: rhbz#171282
Sometimes it is necessary to modify the kernel command-line of the
image, this adds support for a [customizations.kernel] section to the
blueprint:
[customizations.kernel]
append = "nosmt=force"
This will be appended to the kickstart's bootloader --append argument.
Includes tests for modifying the bootloader line, the kickstart
template, and examining the final-kickstart.ks created for a compose.
(cherry picked from commit 010031a46c)
Related: rhbz#1690068
