Add openSUSE Leap 15.4, SLE-15-SP4, and SLE Micro 5.1/5.2 to the database
This request adds recent releases of SUSE products to the database. One additional commit fixes the openSUSE installation script to correctly handle Tumbleweed and openSUSE Leap (bsc#1196965).
Signed-off-by: Charles Arnold carnold@suse.com