Description of problem:
The foreman full-host bootdisk does today not work on UEFI-only systems like microsoft HyperV gen 2

Version-Release number of selected component (if applicable):
ruby193-rubygem-foreman_bootdisk-4.0.2.13

Additional info:
Possibly as simple as adding the '--uefi' flag to call to "isohybrid" in iso_generator.rb, but this is purely a speculation.