Update notebook tests

[cehbrecht]

Description

Notebook tests are failing:
https://travis-ci.org/github/bird-house/birdy/jobs/732306093

Need to update the notebooks ... the external WPS services have changed.

Environment

• Birdy version used, if any:
• Python version, if any:
• Operating System:

Steps to Reproduce

Additional Information

[Zeitsperre]

@cehbrecht

I believe that this has been mostly addressed in #245. There are a few notebooks that are ignored (here). Perhaps we can close this when those have been added/updated?