BSC_Tests: introduce TC_tch_dlci_link_id_sapi for OS#3716

The aim of this test case is to verify DLCI / RSL Link ID conversion
for MO/MT L3 messages on SAPI0/SAPI3.  In particular, the test suite
verifies the following scenarios:

  - RSL -> BSSAP:
    - 16 MO messages on FACCH/F with SAPI0,
    - 16 MO messages on SACCH/F with SAPI3;
  - BSSAP -> RSL:
    - 16 MT messages on FACCH/F with SAPI0,
    - 16 MT messages on SACCH/F with SAPI3.

Change-Id: Ica69ae95b47a67ba99ba9cc36629b6bd210d11e4
Related: OS#3716
diff --git a/bsc/expected-results.xml b/bsc/expected-results.xml
index 5221eae..6ab542a 100644
--- a/bsc/expected-results.xml
+++ b/bsc/expected-results.xml
@@ -88,6 +88,7 @@
   <testcase classname='BSC_Tests' name='TC_rll_est_ind_inval_sapi1' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_rll_est_ind_inval_sapi3' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_rll_est_ind_inval_sacch' time='MASKED'/>
+  <testcase classname='BSC_Tests' name='TC_tch_dlci_link_id_sapi' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_rll_rel_ind_sapi_n_reject' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_rll_err_ind_sapi_n_reject' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_rll_timeout_sapi_n_reject' time='MASKED'/>