SOLR-5118: beef up assertions in SolrIndexConfigTest, this allows us to remove TestPropInject and TestPropInjectDefaults -- neither of which were testing property injection (tested elsewhere) but were doing some basic assertions on the parsing & init of merge policy and merge scheduler

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1510830 13f79535-47bb-0310-9956-ffa450edef68
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

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1510838 13f79535-47bb-0310-9956-ffa450edef68