Added by ttereshc about 2 months ago
Configure createrepo_c to always generate
packagelist element within a package group.
Pulp 2 relies on the packagelist element being present, even if it's empty. It also seems to be a mandatory element according to this unofficial spec https://pagure.io/rpm-metadata/blob/master/f/fedora/comps-schema/comps.dtd#_6
Before this fix, the packagelist element would only be generated if there is at least one package in a group.
(cherry picked from commit 7673cab74e40223fcfb79ada792345356e5945f9)