gprs_ns2: add signalling & data weights for UDP binds

Allow to assign a signalling and data weight to UDP binds.
Those weights will be used when doing dynamic configuration over
IP-SNS.
This is only the first part which only uses the assigned weights
when doing a new SNS configuration.
The outgoing change weight procedure will be supported in a later patch
when the SNS fsm supports outgoing procedures.

Related: SYS#5354
Change-Id: I5133e4229377d44772a9af28628a2bc420fea34b
diff --git a/tests/gb/gprs_ns2_vty.vty b/tests/gb/gprs_ns2_vty.vty
index 397ec26..a748f13 100644
--- a/tests/gb/gprs_ns2_vty.vty
+++ b/tests/gb/gprs_ns2_vty.vty
@@ -30,4 +30,5 @@
 OsmoNSdummy(config-ns-bind)# end
 OsmoNSdummy# show ns
 UDP bind: 127.0.0.14:42999 DSCP: 0
+  IP-SNS signalling weight: 1 data weight: 1
   0 NS-VC: