When DPDK is enbaled, configuring CPU resource limits
through Kubernetes affects packet throughput adversely.
DPDK PMD cores could not get 100% busy.
They need to be configured by isolating them in host grub
and later through PMD core mask.
Change-Id: Ia80880302b9c5c02fdb1c00cb62f6640860e898e
70d93625e8