Use local WSDLs instead of retrieving them.

This should speed up tests and avoid problems down the line if they are
updated.
Accept timeouts when calling an external service.

They occur from time to time and cause unnecessary test failures.
Fix code style
Add URLs for original sources of local WSDL fixtures.
Merge pull request #64 from kasperg/tests-fixtures-timeouts

Improve tests through local fixtures and timeout handling