Merged revision(s) 1575337 from lucene/dev/branches/branch_4x:
unescape %20 in urls so we don't get false failures with 1.7.0_60

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_7@1580613 13f79535-47bb-0310-9956-ffa450edef68