A number of changes in opensuse 15.3 require modifying our strategy. No more XInclude. This seems to be unintentional, but it released and so we will work around it. Some somewhat incorrect values, as pointed out by new validation.
Add a directive to comment out the superfluous autoyast content from SLE when dealing with the more straightforward LEAP.
SLES can have Full media set, support that as well as the Installer/Packages split.
Since the profile is oriented toward installing HPC template, name it more appropriately.
