You have broken assignment of metric name:

It was:
- Use "XMLConstants.DEFAULT_METRIC_NAME" (No name)
- If user have defined custom Id => use this name
- If user have not defined custom Id & default aggregators are used => use default SuccessRate name "XMLConstants.DEFAULT_METRIC_SUCCESS_RATE_NAME"

In this case:
- User has ability to call metric in the way he likes when necessary
- When no user Id assigned => we can determine success rate in DB by default name
- User can't run metric with custom aggregators and default name => meaning of success rate default name in DB will never change

Please restore!