NUTCH-1714 Nutch 2.x upgrade to Gora 0.4

git-svn-id: https://svn.apache.org/repos/asf/nutch/branches/2.x@1594812 13f79535-47bb-0310-9956-ffa450edef68
NUTCH-1674 Use batchId filter to enable scan (GORA-119) for Fetch,Parse,Update,Index (Tien Nguyen Manh and Alparslan Avcı via jnioche)

git-svn-id: https://svn.apache.org/repos/asf/nutch/branches/2.x@1594813 13f79535-47bb-0310-9956-ffa450edef68