Merge "[l2l3 stack] implements new nd state machine & nd buffering"

diff --cc VNFs/vACL/pipeline/pipeline_acl_be.c
Simple merge

diff --cc VNFs/vCGNAPT/pipeline/pipeline_cgnapt_be.c
Simple merge

diff --cc VNFs/vFW/pipeline/pipeline_vfw_be.c
Simple merge