fix illegal usage of unlink in test case
fix illegal usage of unlink in test case

cernbox/core,bluelml/core,michaelletzgus/nextcloud-server,whitekiba/server,jbicha/server,pollopolea/core,pixelipo/server,pollopolea/core,andreas-p/nextcloud-server,IljaN/core,endsguy/server,whitekiba/server,xx621998xx/server,whitekiba/server,sharidas/core,pixelipo/server,owncloud/core,cernbox/core,jbicha/server,owncloud/core,jbicha/server,Ardinis/server,xx621998xx/server,IljaN/core,lrytz/core,nextcloud/server,pmattern/server,nextcloud/server,xx621998xx/server,Ardinis/server,jbicha/server,sharidas/core,bluelml/core,lrytz/core,sharidas/core,andreas-p/nextcloud-server,jbicha/server,pollopolea/core,whitekiba/server,xx621998xx/server,IljaN/core,andreas-p/nextcloud-server,bluelml/core,whitekiba/server,owncloud/core,michaelletzgus/nextcloud-server,pmattern/server,owncloud/core,pixelipo/server,xx621998xx/server,pollopolea/core,bluelml/core,bluelml/core,cernbox/core,pmattern/server,pmattern/server,Ardinis/server,michaelletzgus/nextcloud-server,andreas-p/nextcloud-server,endsguy/server,pixelipo/server,Ardinis/server,nextcloud/server,lrytz/core,cernbox/core,owncloud/core,pixelipo/server,nextcloud/server,lrytz/core,lrytz/core,phil-davis/core,IljaN/core,sharidas/core,endsguy/server,pollopolea/core,IljaN/core,endsguy/server,cernbox/core,sharidas/core,andreas-p/nextcloud-server,pmattern/server,endsguy/server,Ardinis/server,michaelletzgus/nextcloud-server