add support to include VCN name in List API response.

[bigdatasourav]

It would be good to have the VCN name associated to ListSubnets, ListSecurityLists, ListNetworkSecurityGroups api's apart from the vcn_id field to avoid unnecessary joins to get the VCN name associated to the respective security list, subnet or group.

[jodoglevy]

Thanks for the feedback. We'll route this request to the OCI Networking team