Allow manual triggering of batch updates for occurrence validation parameters

* When clicking Model Run in system administration, a Batch End Date must be supplied
* When the model run is complete, if it has a batch end date then the model output handler will set validation parameters on the batch (i.e. environmental suitability, distance from disease extent, machine weighting, is validated)
do you mean to rethrow this, given that you have throws on the method signature?