(fix) bump date and fix filepath

Author: tuurma

src/main/xar-resources/data/lucene/lucene.xml

@@ -3,7 +3,7 @@
         schematypens="http://purl.oclc.org/dsdl/schematron"?><article xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
     <info>
         <title>Full Text Index</title>
-        <date>4Q19</date>
+        <date>1Q20</date>
         <keywordset>
             <keyword>indexing</keyword>
         </keywordset>
@@ -416,7 +416,7 @@
                     </para>
                 <programlisting language="xml" xlink:href="listings/listing-520.xml"/>
                 <programlisting language="xquery" xlink:href="listings/listing-521.txt"/>
-                <para>which assumes hierarchical subject structure stored in <emphasis>/db/lucenetest/subjects.xml</emphasis></para>
+                <para>which assumes hierarchical subject structure stored in <emphasis>/db/subjects/subjects.xml</emphasis></para>
                 <programlisting language="xml" xlink:href="listings/listing-522.xml"/>
                 <para>Next, we may want to define fields for the authors and title of the article. In docbook, <tag>author</tag> can be a complex element,
                     consisting e.g. of a <tag>personname</tag> with nested