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