add is* storage tests
add is* storage tests

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