openstack-repocheck: Exclude Leap15.0 for Queens
openstack-repocheck: Exclude Leap15.0 for Queens

Keep only SLE12SP3 and openSUSE Leap 42.3 for Queens. We have already
Rocky for Leap15.0 which should be enough.

gosipyan/automation,gosipyan/automation,aspiers/automation,SUSE-Cloud/automation,gosipyan/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,aspiers/automation,SUSE-Cloud/automation,aspiers/automation