[CI] Tests not passing under windows and Python 3.8, h5py 2.9

[vasole]

They are mainly HDF5 related tests.

[woutdenolf]

I installed python 3.8.0b1 but don't have wheels for numpy. I tried building from source but got errors. Also tried setting MSVC version manually without success:
"C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" x64 8.1 -vcvars_ver=15.9

How did you manage? This seems to be an unfixed issue:
numpy/numpy#13790

Anyway, I think it is an h5py API change:

pymca/PyMca5/PyMcaIO/NexusUtils.py

Line 278 in dea4f6d

except RuntimeError:

Try adding OSError:

    except (RuntimeError, OSError):

or alternatively:

    if name in parent:
        parent[name][()] = data
    else:
        parent[name] = data  

[vasole]

You can download the relevant packages from

https://www.lfd.uci.edu/~gohlke/pythonlibs/

[vasole]

I tried the above change without success. I think it is the handling of the temporary files.

[woutdenolf]

It fixes the issue for me (see PR, tested on window + py3.8).

[vasole]

It seems I did a mistake somewhere. It fixes the problem for me too. Thanks.