MSC_Tests.ttcn: introduce TC_gsup_mt_sms_{ack|err}

The idea of this test case is to verify MT SMS transmission
initiated by ESME over GSUP. Basically, the algorythm is
the following:

  1.0 send MT-ForwardSM-Req on GSUP,
  1.1 expect Paging Request on RAN,
  1.2 establish a RAN connection,
  1.3 expect CP-DATA/RP-DATA on BSSAP/DTAP,
  2.1 send CP-DATA/RP-ACK on BSSAP/DTAP,
  2.2.a expect MT-ForwardSM-Res,
  2.2.b expect MT-ForwardSM-Err.

Change-Id: I63a25c8366cce0852df6b628365151661a22a25f
Related: OS#3587
2 files changed