Description of problem: Add cobbler and other support so that you can create profiles / systems / distributions to provision and pxe boot aarch64 systems.
This should be resolved in Spacewalk master commit: cdf350539f712d2e950307ba467195bb11cfed8c For PXE booting you must have: 1) installed cobbler-loaders-1.0.3 on your spacewalk system 2) all the normal caviots about having tftpd and xinetd running 3) configured your dhcp server such that for the aarch64 systems they get a "next-server" reference to your Spacewalk server and a "filename" of "aarch64/bootaa64.efi" (not "pxelinux.0" as is common for x86_64 systems)
Found a couple of problems, fixing in Spacewalk master commit: d0ef7d38262b8c7fc1e565f0fdd158e81531fa72
Moving bugs to ON_QA as we move to release Spacewalk 2.3
Spacewalk 2.3 has been released. See https://fedorahosted.org/spacewalk/wiki/ReleaseNotes23