Signed-off-by: anty <ant.rao@gmail.com>
does minor modification to set-classpath.sh to include jars needed by frontend.
set thread's context class loader if unset.Some libraries from java JRE or Ext
use thread's context class loader to load class or resources.
fix bug about the way to compute #numNode of plan fragments, otherwise
will result in un-expected query plan for insert overwrite statement with
constant partition