Expect and discard N-PCSTATE.ind with newer SCCP_Emulation
Newer titan.ProtocolEmulations.SCCP will generate N-PCSTATE.ind when needed. Since our tests written so far don't expect those (yet), discard them at the port level so the indications don't interfere with it. Work to enable them will be done in follow-up patches.
It is sometimes useful to find out the position of the 1st item (only one if the list is expected to be a set of unique items), in order to update extra state on an external list.t
