SOLR-4952: get TestReplicationHandler using solrconfig.snippet.randomindexconfig.xml. This also fixes NumericFieldsTest and TestBinaryField which were using the replication configs for no explicable reason, and since i needed to fix TestBinaryField anyway, i simplified it to use SolrJettyTestBase instead of it's own kludgy setup (merge r1510838)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1510845 13f79535-47bb-0310-9956-ffa450edef68