Added in task to create /etc/mysql/conf.d and include it in RedHat my.cnf

This will allow other roles/tasks to drop extra configuration needed for mysql
into /etc/mysql/conf.d to further tune it
Broken /etc/host entry

The line in /etc/hosts needs "IP    HOSTNAME" but the line was "HOSTNAME   IP"
Merge pull request #21 from geogdog/patch-1

Broken /etc/host entry
Merge pull request #14 from ggillies/mysql_include_dir

Added in task to create /etc/mysql/conf.d and include it in RedHat my.cnf