don't use RIW in this test, it depends on stable merging (and RIW does insane things)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_8@1593402 13f79535-47bb-0310-9956-ffa450edef68
fix test to use IW not RIW; add verbosity when LTC changes live IWC settings

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_8@1593403 13f79535-47bb-0310-9956-ffa450edef68