[dts] [PATCH v1]test_plans/cvl_advanced_iavf_rss_gtpu_test_plan:replace GTPPDUSessionExtensionHeader with GTPPDUSessionContainer

[Tu, Lijuan]

> use the scapy layer GTPPDUSessionContainer instead of local layer
> GTP_PDUSession_ExtensionHeader in gtpu test plan.
> 
> Signed-off-by: qifu <qi.fu at intel.com>

Applied