updating to spark-0.9.1 and hadoop-2.4.0

Signed-off-by: Izhar ul Hassan <ezhaar@gmail.com>
fixed hadoop download

Signed-off-by: Izhar ul Hassan <ezhaar@gmail.com>
reverted hadoop2.4.0 to 2.2.0 after problems with spark091

Signed-off-by: Izhar ul Hassan <ezhaar@gmail.com>