make rat pickier if the license header is screwed up

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1466963 13f79535-47bb-0310-9956-ffa450edef68
don't use doc values if default codec can't support it

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1466964 13f79535-47bb-0310-9956-ffa450edef68