ZP-623 #comment if exporting more than 1000 delete requests throw StatusException, remove folder states if statusexception is received during export, reset status to success only after saving the folder states, do no throw hierarchy-changed in ping when a state can not be found and no ping parameters were sent

git-svn-id: https://z-push.org/svn/z-push/trunk@1963 b7dd7b3b-3a3c-0410-9da9-bee62a6cc5b5