In Tumbleweed genisoimage was dropped in favor of cdrtools,
so installing that no longer works. We can however install
mkisofs directly and switch to that as that is also available
in Leap 42.3 and Leap 15.0+ family distros.
Also drop dependency on libmysqlclient-devel which appears
unnecessary (and is no longer available with mariadb 10.2+)
Change-Id: Ie8402204b6cdf94c21865caba116d3fd1298c5ad
c114449bdb