SOLR-5936: don't use deprecated solr.IntField field type in Solr example tests (dynamic field '*_pi', using solr.IntField via the 'pint' field type, was removed from the main example schema)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1583226 13f79535-47bb-0310-9956-ffa450edef68