#442: data_validator.py, reduce error message in 'training' case
#442: data_validator.py, reduce error message in 'analysis' case
#442: data_config.py, temporarily adjust file
#442: data_validator.py, 'return False' on failed 'validation(s)'
#442: config.py, re-adjust file
Merge pull request #443 from jeff1evesque/python_data_validator

#442: Reduce error output in jsonschema validation(s)