Remove the filesets relating to dependencies. We handle those with 
the CLASSPATH environment variable.
Index: spark/build.xml
===================================================================
--- spark.orig/build.xml	2010-11-29 22:12:50.540491256 +0000
+++ spark/build.xml	2010-11-29 22:13:17.450491999 +0000
@@ -30,7 +30,7 @@
         </fileset>
 
         <!-- Include all elements that Tomcat exposes to applications -->
-        <pathelement location="${catalina.home}/common/classes" />
+<!--        <pathelement location="${catalina.home}/common/classes" />
         <fileset dir="${catalina.home}/common/endorsed">
             <include name="*.jar" />
         </fileset>
@@ -40,7 +40,7 @@
         <pathelement location="${catalina.home}/shared/classes" />
         <fileset dir="${catalina.home}/shared/lib">
             <include name="*.jar" />
-        </fileset>
+        </fileset>-->
 
     </path>