move MetadataUrl to pywps.app.Common to avoid dependencies on sphinx

[tlvu]

Fixes https://github.com/geopython/pywps/issues/564

Tried the same steps as in the original issues, the error is gone.

$ python                                                                                                                                        
Python 3.8.5 (default, Sep  4 2020, 07:30:14)                                                                                                         
[GCC 7.3.0] :: Anaconda, Inc. on linux                                                                                                                
Type "help", "copyright", "credits" or "license" for more information.                                                                                
>>> from pywps import tests                                                                                                                           
>>>              

Also tested this change in project using MetadataUrl at the old location:

cd <flyingpigeon checkout>
conda env update -f environment-docs.yml
conda activate flyingpigeon-docs
pip install git+https://github.com/geopython/pywps@fix-pywps.ext_autodoc.MetadataUrl-wrong-location --upgrade
make docs

Contribution Agreement

(as per https://github.com/geopython/pywps/blob/master/CONTRIBUTING.rst#contributions-and-licensing)

• [ x ] I'd like to contribute [feature X|bugfix Y|docs|something else] to PyWPS. I confirm that my contributions to PyWPS will be compatible with the PyWPS license guidelines at the time of contribution.
• [x ] I have already previously agreed to the PyWPS Contributions and Licensing Guidelines

[coveralls]

Coverage decreased (-0.5%) to 74.957% when pulling d389ee637044b09eb1c91f9a5d21dceebf71e520 on fix-pywps.ext_autodoc.MetadataUrl-wrong-location into effc9cd3195814a5b4ff541c98704947d467fcd0 on pywps-4.2.

[cehbrecht]

Looks good. @cehbrecht Is it ok to push this in the 4.2 branch? I'm still confused regarding the status of master.

Yes ... the 4.2 branch is still our production version.

[cehbrecht]

@tlvu @huard Thanks for the fix :smile: