Revert "backend tests: change loglevel to WARN (#4514)"

Logging verbosity of the openapi handlers was turned down so GitHub
should be happier with INFO now. This makes it easier to troubleshoot
problems.

This reverts commit b98aaf4904.

src/tests/frontend/travis/runnerBackend.sh

@@ -15,8 +15,6 @@ s!"soffice":[^,]*!"soffice": "/usr/bin/soffice"!
 # Reduce rate limit aggressiveness
 s!"max":[^,]*!"max": 100!
 s!"points":[^,]*!"points": 1000!
-# GitHub does not like our output
-s!"loglevel":[^,]*!"loglevel": "WARN"!
 ' settings.json.template >settings.json
 
 log "Assuming src/bin/installDeps.sh has already been run"