Add MySQL Timezone Support

[j0nes2k]

MySQL normally uses timezone tables in its mysql databases. These are needed if you want to set the used timezone on a per-connection basis:

set time_zone = 'Europe/Berlin'

These tables are generated by the mysql_tzinfo_to_sql command: http://dev.mysql.com/doc/refman/5.5/en/mysql-tzinfo-to-sql.html

If you are trying to use the above command on the docker-mysql container, this fails with:
Unknown or incorrect time zone: 'Europe/Berlin'