SOLR-6509: Solr start scripts interactive mode doesn't honor -z argument

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1626847 13f79535-47bb-0310-9956-ffa450edef68
can't use SimpleText for this test

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1626848 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6354: stats.field can now be used to generate stats over the numeric results of arbitrary functions

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1626856 13f79535-47bb-0310-9956-ffa450edef68