Create Mysql playbook

- Install MySL server and set password for root user from local
  environment variable.
- Continue ansible run if mysql_user fails. Password is already
  configured at first run.
- Remove debuging from mysql playbook and rename mysql password setup
  task.
- Change mysql data folder setting, move mysql data folder and restart
  required service.
- Cheack if apparmor is installed and reconfigure if it does.
- Move mysql playbook to webservers section.
- Change password variable to mysql_root_passwd.

Fixes #11
Closes #35
Rename mysql-server -> mysql

Ref #11
Ref #35
Rename mysql_root_passwd MYSQL_ROOT_PASSWD

Ref #11
Ref #35