Zypper uses the concept of "vendor stickiness" and will refuse to upgrade packages that require a vendor change. This change introduces a new override variable to instruct zypper to view a list of vendors as equivalent. Change-Id: Ib3412b02f1edf9aae03cd5478ac2310cce3f2e8a Signed-off-by: Nicolas Bock <nicolas.bock@suse.com>