TP_5GNAS_AMF_REG_REJ_01 objective update

        TP Id TP_5GNAS_AMF_REG_REJ_01 

        Test objective "Verify that the IUT rejects initial registration request due to general NAS level mobility management congestion control with 5GMM cause value #22 - congestion."

        Test objective "Verify that the IUT rejects initial registration request due to general NAS level mobility management congestion control with 5GMM cause value #22 - congestion and assign a value for back-off timer T3346."

        Reference 

            "ETSI TS 124 501 [1], Clause 5.5.1.2.5"