cleanup TestSolrCoreProperties so that it's less hackish and absurd -- and while we're at it, close the book on SOLR-4952

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1513996 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5176: remove _TestUtil.keepFullyDeletedSegments

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1514052 13f79535-47bb-0310-9956-ffa450edef68
Simple init logging of processor chains

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1514053 13f79535-47bb-0310-9956-ffa450edef68