Commit
7613dc0e2cfe5360c25efb86236a70f78ff1e23b
by Pau Espin Pedrollibrary/NGAP_Functions: return NAS_PDU IE from InitialContextSetup if present
This is required to obtain the NAS PDU transmitted by open5gs-smfd
during Network Triggered Service Request.
In that message, the NAS_PDU inside the
PDUSessionResourceSetupListCxtReq item is empty, and instead the global
NAS_PDU is filled with a Service Accept.
Change-Id: I7fced3f920c2514f58711a2ca1cc60c8dc79e395