* update lab000/hadoop-local-mode
   - wait 5 seconds for terminating java processes
 * update lab001/hadoop-pseudo-mode
   - /usr/bin/java is conflict with openjdk
     use folder /usr/lib/jvm/java-6-sun instead
   - remove sun-java6-plugin package (which is not required)
   - download only if ${HOME}/hadoop is not exist
   - delete hadoop tarball after extract
   - reduce HADOOP_HEAPSIZE to 128