fdo#67699: Don't forget to set filter name to the descriptor.
fdo#67699: Don't forget to set filter name to the descriptor.

Actually the detection code works just fine without having the detection
service set the filter name here. But it's supposed to.

Change-Id: Ic6a4325b5ceb532d0691781388f66c24cd695ca5

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core