NS_Emulation: Respect data_weight==0 or signalling_weight==0

* allow configuration of signalling + data weight for each NS-VC
* advertise per-NSVC signalling/data weight in SNS-CONFIG
* keep track of unblocked NS-VCS separately for data / signalling
* transmit BVCI=0 traffic only over signalling NS-VC
* transmit BVCI>0 traffic only over data NS-VC
* accept incoming BVCI=0 traffic only if signalling_weight > 0
* accept incoming BVCI>0 traffic only if data_weight > 0

Related: OS#4953
Change-Id: I9798e639b4bc8658482945970775b012b5840779
diff --git a/pcu/PCU_Tests_SNSv6.cfg b/pcu/PCU_Tests_SNSv6.cfg
index cae9a75..3747f0a 100644
--- a/pcu/PCU_Tests_SNSv6.cfg
+++ b/pcu/PCU_Tests_SNSv6.cfg
@@ -18,6 +18,8 @@
 					local_udp_port := 23000,
 					remote_ip := "::1",
 					remote_udp_port := 22000,
+					data_weight := 1,
+					signalling_weight := 1
 				}
 			},
 			nsvci := 1234