Fix ERD generation build step
Fix ERD generation build step

Do not depend on snapshot version of SchemaSpy. Pegging it to 6.1.0 since it seems to work for the build.

OpenLMIS/openlmis-referencedata,OpenLMIS/openlmis-referencedata,OpenLMIS/openlmis-referencedata,OpenLMIS/openlmis-referencedata