Stream flammenwehrfer output so you get something if it times out

6 jobs for !51 with fix/flammenwehrfer-stream-output in 25 minutes and 29 seconds (queued for 3 seconds)
latest merge request
Name Stage Failure
gruppen: [3, larsk21/compiler-minijava, 1] Run
[ERROR] -> [Help 1]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1]
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1