run mysql_secure_installation in unattended mode at wikisuite install time (after mariadb)

After installing mariadb, run mysql_secure_installation

See: http://wikisuite.org/tiki-pagehistory.php?page=How+to+install+Tiki+Wiki+CMS+Groupware+on+ClearOS&show_all_versions=y&newver=0&oldver=18&oldver_idx=17

According to the instructions ( https://mariadb.com/kb/en/mariadb/mysql_secure_installation/ ) you can choose which actions to do (the same I usually do by hand one by one, plus a few more), so it seems safe if you know what you are doing.

For the general instructions, should we suggest to run in unattended mode in default ClearOS installs?
"mysql_secure_installation --use-default" (according to https://dev.mysql.com/doc/refman/5.7/en/mysql-secure-installation.html ), if the mysql/mariadb is equal or newer to 5.7.4.

(Edited to raise priority from 3 to 2)