SOLR-1301: Fix windows problem with escaping of folder name (see crazy https://github.com/typesafehub/config/blob/master/HOCON.md for correct format: string must be quoted and escaped like javascript)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1547239 13f79535-47bb-0310-9956-ffa450edef68