lucene41 -> disk

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene4547@1433088 13f79535-47bb-0310-9956-ffa450edef68
simplify packedints usage for in-ram norms impl

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene4547@1433091 13f79535-47bb-0310-9956-ffa450edef68