Remove tool provisioning from DpdkVnfSetupEnvHelper._setup_dpdk
Both "uio" and "igb_uio" drivers are present in the VM image generated
using "./nsb_setup.sh" script. "igb_uio" driver is compiled along with
the DPDK library compilation.
Tool "nsb_setup.sh" provisioning and execution should be removed from
this function because there is not needed anymore.
In case "igb_uio" driver is not loaded, an exception should be raised.
JIRA: YARDSTICK-999
Change-Id: I89174f84ac36d8231587402c96751746cb18e290
Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>