Fix for regression introduced in r284.

Generating SOAP webservice API documentation on the fly fails mysteriously
if mutalyzer/webservice.py does not contain the WSGI application variable.


git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/branches/refactor-mutalyzer-branch@292 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1