Quells some compiler warnings in new test

24 jobs for mohr/issue151 in 117 minutes and 20 seconds (queued for 3 seconds)
Name Stage Failure
failed
benchmark_build_time Test
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='i10grafana.informatik.uni-erlangen.de', port=8086): Max retries exceeded with url: /write?db=terraneo&precision=s (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f8ff100d730>: Failed to establish a new connection: [Errno 111] Connection refused'))
Cleaning up file based variables
ERROR: Job failed: exit code 1