ERA5T Data cannot be processed in function era5.weather_df_from_era5

[woutertP1]

Since recently it's possible to download ERA5T reanalysis data (ERA5T= ERA5 preliminary data) within a normal ERA5 request. This can happen when you request data not older than 3 months. The request will be processed by Copernicus like any other ERA5 request, only to provide a NetCDF with two columns per requested variable (e.g. v100). These columns are the same as normal ERA5 request, only with suffix '_0001' or '_0005'. More information here:

https://confluence.ecmwf.int/display/CKB/ERA5%3A+data+documentation

I think the proper place to change is at the following location: https://github.com/oemof/feedinlib/blob/c3f829befb3dc0d097420ae200779c91af081a23/feedinlib/era5.py#L380

(If I have a bit of time left, I can create a pull request.)

[uvchik]

We should test if the problem persists and fix it before the v0.1.0 release.