Fix for CONNECTORS-997

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/trunk@1611228 13f79535-47bb-0310-9956-ffa450edef68
Chained connectors always scan parent nodes

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/trunk@1611230 13f79535-47bb-0310-9956-ffa450edef68
Revert most of the last change; the SharePoint connector is a chained connector which therefore must rescan its parent nodes

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/trunk@1611231 13f79535-47bb-0310-9956-ffa450edef68