Changes

WIP: stp: Introduce STP_Tests_TCAP

The network topology and test infrastructure already allows testing TCAP forwarding
at STP over IPA<->IPA, M3UA<->IPA and M3UA<->M3UA.

TODO:
* Currently f_asp_tx_tcap_full_transaction() is tweak to pass based on
  regular M3UA OPC+DPC+SLS loadsharing routing, see the functions
  f_asp*_any() being used instead of expecting Rx on a specific ASP.
* There's some initial IPA extension TCAP_ROUTING in place and sending
  data properly to the STP, but it hasn't yet really been clarified how
  is that supposed to work at the STP...
* Currently there's no route range setup for M3UA since it hasn't been
  clarified yet how is that supposed to work.

Related: SYS#5423
Change-Id: I4340bdf126118c66af861f5a447e90883783920e