tests: a little more debug logging

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1460761 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4642: QueryResultKey is not calculating the correct hashCode for filters.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1460803 13f79535-47bb-0310-9956-ffa450edef68