Problem: role not compatible with python3 about ansible-nginx

[mamedin]

See: https://docs.ansible.com/ansible/2.4/playbooks_python_version.html#dictionary-views

"In Python2, the dict.keys(), dict.values(), and dict.items() methods returns a list. Jinja2 returns that to Ansible via a string representation that Ansible can turn back into a list. In Python3, those methods return a dictionary view object. The string representation that Jinja2 returns for dictionary views cannot be parsed back into a list by Ansible. It is, however, easy to make this portable by using the list filter whenever using dict.keys(), dict.values(), or dict.items()."

[hakamine]

Fixed by #10 (same as #12)