[v32] GenericApplication: use empty string for setupScript default
BEGINRELEASENOTES
*Workflow
FIX: Fix for GenericApplication
when no setup script is set, fixes ILCDIRAC-971
ENDRELEASENOTES
BEGINRELEASENOTES
*Workflow
FIX: Fix for GenericApplication
when no setup script is set, fixes ILCDIRAC-971
ENDRELEASENOTES