This is something we need to simulate more complex scenarios,
particularly in the context of frame relay.
Change-Id: If1220852785853f8a5d8de183d5053ddd6ccb958
With PCUIF 10 the remote can be IPv4 or IPv6.
Add all missing parts including SNS IPv6 elements,
the support to omit IPv4 elements and a PCU_Tests_SNSv6.cfg
configuration to run all tests with IPv6
Change-Id: I43d64caca600fff78f3fbbb3e8179f447f235d46