[heroes] updates on the repositories list on openSUSE:infrastructure

Hello, I performed the following actions on the repositories of openSUSE:infrastructure (only, not the subrepos) - added leap15 and sle15 repos - removed leap42.1 and sle12sp2 - disabled by default leap42.2 Let me know if there are any problems/objections -- Theo Chatzimichos System Administrator SUSE Operations and Services Team