ipxe-bootimgs will soon include the ipxe efi variant
ipxe-snponly-x86_64.efi which has no networking stack, relying instead
on the UEFI networking stack. This image is required in some UEFI
environments instead of the full ipxe-x86_64.efi, so there needs to be
a mechanism for serving it by default.
This change makes this possible by setting the puppet parameter
ironic::pxe::ipxe_name_base to ipxe-snponly.
Change-Id: I3a0e85ce6d83001833c829f484baf181a677a5d9
(cherry picked from commit ca47ba7c7f)
eb88c5afb3