NS_Emulation: Move SNS handling from NS-VC to NS-VCG

We need to move the IP-SNS handling up one layer, as only the NS-VCG
knows all the other NS-VCs, and after the SNS-CONFIG-ACK, we must
mark all of our NS-VCs as alive and start the alive procedure.

Related: OS#4953
Change-Id: Ie0f4342a0346952d7c50ac36900148e311d4c782
2 files changed