if somebody gets an error like: mariadb-client-10.2 : Depends: mariadb-client-core-10.2 (>= 10.2.36+maria~stretch) but it is not going to be installed)
remove this part from package list at /autoinstaller/Packages/debian-stretch.xml
Debian Repo has an older libmariadbclient package, i run into that issue while upgrading from 1.4.4. to 1.5.3