Try:
1. Open '/etc/yum.repos.d/kloxo-mr.repo and change 'enable=1' to 'enable=0' under [kloxo-mr-mariadb32] for 32bit OS or [kloxo-mr-mariadb64] for 64bit OS
2. Convert aria storage-engine (if using aria) with:
sh /script/mysql-convert --engine=innodb
3. Remove MariaDB with:
rpm -e MariaDB-server --nodeps
rpm -e MariaDB-client --nodeps
rpm -e MariaDB-compat --nodeps
rpm -e MariaDB-common --nodeps
4. Install mysql with:
yum install mysql55 mysql55-server
5. Create service and copy my.cnf with:
cp -rf /etc/my.cnf.d/my.cnf /etc/my.cnf
chkconfig mysqld restart
6. Restart mysql with:
service mysqld restart
6. Reset mysql root password with:
sh /script/reset-mysql-root-password YOURPASSWORD