Move helma.xsl from helma/objectmodel/db to helma/objectmodel/dom package

(following the move of XmlDatabase)

build/build.xml

@@ -86,8 +86,8 @@
         <copy file="${build.src}/META-INF/services/javax.imageio.spi.ImageWriterSpi"
             todir="${build.classes}/META-INF/services"/>
         <!-- copy helma db style sheet -->
-        <copy file="${build.src}/helma/objectmodel/db/helma.xsl"
-            todir="${build.classes}/helma/objectmodel/db" />
+        <copy file="${build.src}/helma/objectmodel/dom/helma.xsl"
+            todir="${build.classes}/helma/objectmodel/dom" />
         <javac srcdir="${build.src}"
             destdir="${build.classes}"
             debug="${debug}"