Fix logic of file downloading, #227

[kba]

No description provided.

[codecov-io]

Codecov Report

Merging #232 into master will decrease coverage by 0.15%.
The diff coverage is 95.34%.

@@            Coverage Diff             @@
##           master     #232      +/-   ##
==========================================
- Coverage     100%   99.84%   -0.16%     
==========================================
  Files          30       30              
  Lines        1261     1258       -3     
  Branches      247      246       -1     
==========================================
- Hits         1261     1256       -5     
- Misses          0        1       +1     
- Partials        0        1       +1

Impacted Files	Coverage Δ
..._validators/ocrd_validators/workspace_validator.py	100% <100%> (ø)	⬆️
ocrd_models/ocrd_models/ocrd_file.py	100% <100%> (ø)	⬆️
ocrd/ocrd/constants.py	100% <100%> (ø)	⬆️
ocrd_models/ocrd_models/ocrd_mets.py	100% <100%> (ø)	⬆️
ocrd/ocrd/resolver.py	100% <100%> (ø)	⬆️
ocrd/ocrd/workspace.py	97.61% <90%> (-2.39%)	⬇️

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