MAR-33: Implemented tests for the wsgi_website role:

- Updated test playbook to have better coverage of functionality.
- Fixed some additional permission mode issues (leading zero).
- Use expanded syntax for deploying TLS material in order to avoid mangling of
TABs.
- Implemented proper WSGI applications in order to test everything.
- Implemented tests covering mandatory parameters, optional parameters, and the
use of WSGI requirements/Paster.