Add logging improvements to PPD

[tomguilbert]

Definition of done:

• Add config.log_level to environment configurations
  • default to DEBUG in development & test
  • default to INFO in production
• Ensure latest version of Data Services API gem is being used: 1.5.4
• Ensure latest version of JSON Rails Logger gem is being used: 2.0.5
• Ensure the information passed to the logger include:
  • timestamp
    • Date in ISO8061 format
      • YYYY-MM-DDThh:mm:ss.msZ
  • request_id
    • X-Request-ID of original incoming request as generated by the reverse proxy
  • method
    • HTTP method
      • DELETE|GET|PATCH|POST|PUT| etc
  • path
    • HTTP request path
  • level
    • Severity of event
      • DEBUG|INFO|WARN|ERROR|FATAL
  • message
    • Human readable description of logged event
    • Could require, or benefit from, additional values presented like time taken and/or returned rows
    • Additional values should be included as structured fields if used
  • query_params
    • HTTP request parameters as a stringified JSON object (OPTIONAL)
  • body
    • HTTP request or response body (OPTIONAL)
  • status
    • HTTP response status code
      • 2xx|3xx|4xx|5xx
  • request_time
    • Time taken to process the event
      • logged as a float/decimal value string: 0.003
      • displayed in message: time taken 3ms
  • returned_rows
    • The number of rows / records returned by a request (OPTIONAL)
  • request_status
    • The status of a request
      • received | processing | complete

[jonrandahl]

@tomguilbert can we close this as the changes are now live?