Benchmark module: Fix obsolete reference to 'doc.maker.forever' (it's actually 'content.source.forever')

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1646379 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6058: Include the new solr logo in the admin ui, and make the favicon the sun glyph from the new solr logo

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1646382 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6626 NPE when the filed values are null

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1646388 13f79535-47bb-0310-9956-ffa450edef68