hnbgw: parameterize IuCS and IuPS ips and ports: add vty cmds

Basically copy-paste the Iuh local-ip and local-port code to provide
parameterization of the IuCS and IuPS remote addresses.

Add IUCS and IUPS nodes, enhance go_parent_cb and config writing accordingly.

Change-Id: I2c28977011009df4e1fa472290bbbc359e406971
4 files changed