erge branch 'port-to-v3' of https://github.com/OCR-D/ocrd_kraken into port-to-v3

Author: kba

tests/conftest.py

@@ -42,6 +42,7 @@ def _start_mets_server(*args, **kwargs):
             else:
                 yield {'workspace': workspace}
         config.reset_defaults()
+        disableLogging()
     return _make_workspace