extend test case for etag preservation
extend test case for etag preservation

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