Import test: check stderr for output

[manics]

logback.xml is bundled in OMERO.java 5.6.3+, which redirects the output expected by the test

[sbesson]

Using omero-py bundled with the server,

[sbesson@ome-demoserver ~]$ /opt/omero/server/OMERO.server/bin/omero import -f -l no_fakes.txt test.fake --file ~/out --errs ~/err
[sbesson@ome-demoserver ~]$ cat ~/out 
[sbesson@ome-demoserver ~]$ cat ~/err
2020-10-01 14:41:21,051 274        [      main] INFO          ome.formats.importer.ImportConfig - OMERO.blitz Version: 5.5.7
2020-10-01 14:41:21,068 291        [      main] INFO          ome.formats.importer.ImportConfig - Bioformats version: 6.5.1 revision: 6f50e4d52c9d96112635fd8b2dde737f31041cf0 date: 7 July 2020
2020-10-01 14:41:21,104 327        [      main] INFO   formats.importer.cli.CommandLineImporter - Log levels -- Bio-Formats: ERROR OMERO.importer: INFO
2020-10-01 14:41:21,405 628        [      main] INFO      ome.formats.importer.ImportCandidates - Depth: 4 Metadata Level: MINIMUM
2020-10-01 14:41:21,418 641        [      main] INFO      ome.formats.importer.ImportCandidates - 1 file(s) parsed into 0 group(s) with 1 call(s) to setId in 10ms. (13ms total) [1 unknowns]

i.e. the parsed into line is sent to the stderr as one should expect.
Thanks for correcting this (and fixing the logging)