NUTCH-1708 use same id when indexing and deleting redirects

git-svn-id: https://svn.apache.org/repos/asf/nutch/trunk@1614375 13f79535-47bb-0310-9956-ffa450edef68
NUTCH-1561 improve usability of parse-metatags and index-metadata

git-svn-id: https://svn.apache.org/repos/asf/nutch/trunk@1614586 13f79535-47bb-0310-9956-ffa450edef68