tests: use logging instead of stdout so output interleaves properly
tests: use logging instead of stdout so output interleaves properly

git-svn-id: 3b1ff1236863b4d63a22e4dae568675c2e247730@819420 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr