SOLR-5486: cleanup DeleteInactiveReplicaTest

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1544033 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5437: cleanup DeleteReplicaTest

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1544034 13f79535-47bb-0310-9956-ffa450edef68