BTS_Tests.ttcn: fix: properly expect I-frames in f_TC_encr_cmd()

For some reason, in f_TC_encr_cmd() it was expected / assumed that
when a ciphered I-frame is sent from MS on L1CTL, nothing else
than this frame would arrive. But since we have fixed Measurement
Reporting in trxcon (see OS#2988), the MR related messages do
appear on A-bis interface now!

This change introduces a new function f_data_mo(), which should
be used to send I-frames from MS and expect them on A-bis.

So, the following test cases:

  - TC_encr_cmd_a51;
  - TC_encr_cmd_a52;
  - TC_encr_cmd_a53;

should pass with both trxcon and Calypso PHY now :)

Change-Id: I08cb28dd9fa23f3ef8b0c9ede3d4c47f5702a1c1
1 file changed