sgsn: fix TC_iu_attach_geran_rau: register the new TLLI

We're getting a new TLLI assigned during the attach procedure (see
Allocated P-TMSI in the GMM Attach Accept message), which needs to
be registered in order to receive BSSGP PDUs from BSSGP_Emulation.

Change-Id: Idafcbd7e44a523a26dc34dc72e38ff879782148e
diff --git a/sgsn/expected-results.xml b/sgsn/expected-results.xml
index bef13dc..2351ace 100644
--- a/sgsn/expected-results.xml
+++ b/sgsn/expected-results.xml
@@ -88,12 +88,7 @@
   <!-- SGSN_Tests_Iu testcases start here -->
   <testcase classname='SGSN_Tests_Iu' name='TC_iu_attach' time='MASKED'/>
   <testcase classname='SGSN_Tests_Iu' name='TC_iu_attach_encr' time='MASKED'/>
-  <testcase classname='SGSN_Tests_Iu' name='TC_iu_attach_geran_rau' time='MASKED'>
-    <failure type='fail-verdict'>"BSSGP_Emulation.ttcnpp:830 : Couldn't find Component for TLLI 'E918E6AA'O"
-      SGSN_Tests_Iu.ttcn:MASKED SGSN_Tests_Iu control part
-      SGSN_Tests_Iu.ttcn:MASKED TC_iu_attach_geran_rau testcase
-    </failure>
-  </testcase>
+  <testcase classname='SGSN_Tests_Iu' name='TC_iu_attach_geran_rau' time='MASKED'/>
   <testcase classname='SGSN_Tests_Iu' name='TC_geran_attach_iu_rau' time='MASKED'/>
   <!-- SGSN_Tests_NS (handle_sns == true) testcases start here -->
   <testcase classname='SGSN_Tests_NS' name='TC_SNS_size' time='MASKED'/>