S1AP_Emulation: Fix NAS_PDU decoding of InitialContextSetupRequest msg

The InitialContextSetupRequest message contains a NAS_PDU deep inside
(in E-RABToBeSetupListCtxtSUReq), and it was not being rx_counted nor
decoded by the S1AP_Emulation.
Since we also care about the lower layer contents from the emulation
user point of view, first send the S1AP_PDU and later the decoded NAS_PDU.
This way the user can wait to receive the related low level S1AP_PDU,
and then read again from the port to get the decoded NAS_PDU.

Change-Id: Ibff5a38b92deafa8d104801f107ca1b8b82bbce0
1 file changed