Add base check_media, modify_iso, and generate_new_iso methods.
Add base check_media, modify_iso, and generate_new_iso methods.

This makes pylint happier.

Signed-off-by: Chris Lalancette <60b62644009db6b194cc0445b64e9b27bb26433a@redhat.com>

moofrank/oz,cernops/oz,mgagne/oz,imcleod/oz,ndonegan/oz,nullr0ute/oz,NeilBryant/oz,moofrank/oz,NeilBryant/oz,mgagne/oz,clalancette/oz,clalancette/oz,cernops/oz,ndonegan/oz,nullr0ute/oz,imcleod/oz