Remove derby references from rss connector

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-1044@1627326 13f79535-47bb-0310-9956-ffa450edef68
Remove derby dependency from solr

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-1044@1627327 13f79535-47bb-0310-9956-ffa450edef68