Deprecation warning for the use of `sudo`

[fabianbuechler]

This is not a bug report, only a deprecation warning:

When using this role with Ansible 2.0.0.2, ansible warns about the use of sudo instead of the new become. See http://docs.ansible.com/ansible/become.html for reference.

[DEPRECATION WARNING]: Instead of sudo/sudo_user, use become/become_user and make sure become_method is 'sudo' (default). This feature will be removed in a future release. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.

Thank you for the great role, works like a charm!