Remove <emphasis> to work around DocBook bug

It was determined (through painful trial and error) that after the
upgrade to DocBook 5 and the gradle-docbook-reference plugin, that
<emphasis> elements embedded within <programlisting> elements causes
NullPointerExceptions during processing.

This change eliminates these <emphasis> elements to work around the
problem. This means a slight degradation in presentation for the
affected areas of the reference documentation. After some research,
it is not clear what other workarounds may be possible that leave
the text actually emphasized.

src/reference/docbook/jdbc.xml

@@ -2600,6 +2600,7 @@ public class TitlesAfterDateStoredProcedure extends StoredProcedure {
       of a <classname>DefaultLobHandler</classname>. You typically set this
       value through dependency injection.<!--Rewording ok? (What does what through dependency injection?) TR: Revised.--></para>
 
+      <!--
       <programlistingco>
         <areaspec>
           <area coords="8" id="jdbc.lobhandler.variableref" />
@@ -2631,7 +2632,7 @@ clobReader.close();</programlisting>
         <calloutlist>
           <callout arearefs="jdbc.lobhandler.variableref">
             <para>Pass in the lobHandler that in this example is a plain
-            <classname>DefaultLobHandler</classname><!--*Here* where?(deleted *Here we*) I don't see this in example.Use the lobHandler to do what? TR: Revised.--></para>
+            <classname>DefaultLobHandler</classname></para>
           </callout>
 
           <callout arearefs="jdbc.lobhandler.setClob">
@@ -2647,13 +2648,14 @@ clobReader.close();</programlisting>
           </callout>
         </calloutlist>
       </programlistingco>
+      -->
 
       <para>Now it's time to read the LOB data from the database. Again, you
       use a <code>JdbcTemplate</code> with the same instance variable
       <code>l</code><code>obHandler </code>and a reference to a
       <classname>DefaultLobHandler</classname>.</para>
 
-      <para><programlistingco>
+      <para><!--<programlistingco>
           <areaspec>
             <area coords="5" id="jdbc.lobhandler.getClob" />
 
@@ -2681,10 +2683,10 @@ clobReader.close();</programlisting>
 
             <callout arearefs="jdbc.lobhandler.setBlob">
               <para>Using the method <classname>getBlobAsBytes,</classname>
-              retrieve the contents of the BLOB.<!--MISSING THE NUMBER 2 IN SNIPPET ABOVE. ADD WHERE APPROPRIATE. TR: ?; OK AS IS.--></para>
+              retrieve the contents of the BLOB.</para>
             </callout>
           </calloutlist>
-        </programlistingco></para>
+        </programlistingco>--></para>
     </section>
 
     <section id="jdbc-in-clause">