Make the filter field optional in the Dataset dataset of the metadata.

Change-Id: Ibd2ba0edf4c8969ba4974375f5b0e0f6ddfb02ba
Reviewed-on: http://fulliautomatix.ics.uci.edu:8443/94
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Ian Maxon <imaxon@uci.edu>
16 files changed