1. Scoring endpoint should return json, not stringified json

curl -H "Authorization: Bearer $token" $scoringUri \
  -d '{"data":[[1,2,3,4,5,6,7,8,9,10],[10,9,8,7,6,5,4,3,2,1]]}' \
  -H Content-type:application/json

Returns:

"{\"result\": [5113.099642122809, 3713.6329271385334]}"

Expected:

{"result": [5113.099642122809, 3713.6329271385334]}

Probably we should avoid json.dumps() in:

1. Scoring endpoint should not return 200 in case of error

Exceptions are swallowed at

The code should not only return the error message but also set an appropriate HTTP return code.