This test currently fails because open5gs-smfd is not triggering the
tear down in smf_gy_handle_cca_update_request().
Related: SYS#6845
Change-Id: Ie58ae2a5e870b183fa1c56c90c94f5eee56386e0
This test allows initial testing of a session creation through the S2b
interface (emulating an ePDG).
A follow-up test will be added to test the APCO IE (feature which
open5gs-smfd still doesn't support).
Change-Id: I38e469edf0e00feca5a648035b64645e2c905937