VestaCP Upgrade MYSQL 5.6 for CentOS6
rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm
You can edit file: /etc/yum.repos.d/mysql-community.repo
yum update mysql-server service mysqld restart mysql_upgrade chkconfig mysqld on
This will update your MySQL to MySQL 5.6