data: Add test.xls
data: Add test.xls

The content was taken from test.csv. It will be used for examples of the XLS
import API.

jgaupp/arx,kbabioch/arx,COWYARD/arx,tijanat/arx,arx-deidentifier/arx,RaffaelBild/arx,tijanat/arx,fstahnke/arx,COWYARD/arx,bitraten/arx,kentoa/arx,jgaupp/arx,TheRealRasu/arx,kbabioch/arx,kentoa/arx,fstahnke/arx,bitraten/arx,arx-deidentifier/arx,RaffaelBild/arx,TheRealRasu/arx