I created a temporary policy to allow it so Selinux remains online.
This is a first for me for MySQL/mariaDB. Did they break something?
module MariaDB-5.5.54-mysqlhelper 1.0;
require { type mysqld_safe_t; class capability { setgid setuid }; }
#============= mysqld_safe_t ============== allow mysqld_safe_t self:capability { setgid setuid };