Further refinement of process killing.

build.xml

@@ -235,7 +235,7 @@
       <istrue value="${seleniumjar}" />
       <then>
         <exec command="pkill -f xvfb" />
-        <exec command="pkill -f &quot;java -jar ${seleniumjar}&quot;" />
+        <exec command="pkill -f &quot;java -jar `basename ${seleniumjar}`&quot;" />
       </then>
     </if>