Add field groupId to connectionContext

[Mixaster995]

Description

Add new field groupId to ConnectionContext to enable possibility for mutually aware nse(which belongs to the same group)

message ConnectionContext {
    IPContext ip_context = 1; 
    DNSContext dns_context = 2; 
    EthernetContext ethernet_context = 3;
    map<string, string> extra_context = 4; 
    uint32 MTU = 5;
    string group_id =6 /*new field,*/
}

Issue

part of #121

Definition of done

• Add new field to proto file (it has to be at the bottom)
• Regenerate all code

[denis-tingaikin]

@Mixaster995 I don't think that adding id is a good idea. Could you please explain how it will be set on the NSE side?

[edwarnicke]

Can we close this issue?

[denis-tingaikin]

It's done.