epdg: Introduce test TC_hss_initiated_update_user_profile(_unknown)

This test so far only validates the SWx interface during the procedure.
It can be extended at a later time when implementing propagation of the
procedure to other interfaces in osmo-epdg.

Related: OS#6042
Change-Id: Ic7c19a3fe7b2b1411414fb6b78ab9a665a1aa42b
diff --git a/epdg/expected-results.xml b/epdg/expected-results.xml
index ccc69cb..83155cd 100644
--- a/epdg/expected-results.xml
+++ b/epdg/expected-results.xml
@@ -9,6 +9,8 @@
   <testcase classname='EPDG_Tests' name='TC_s2b_CreateSession_rejected' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_hss_initiated_deregister_new_server_assigned' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_hss_initiated_deregister_permanent_termination' time='MASKED'/>
+  <testcase classname='EPDG_Tests' name='TC_hss_initiated_update_user_profile' time='MASKED'/>
+  <testcase classname='EPDG_Tests' name='TC_hss_initiated_update_user_profile_unknown' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_concurrent_ues2' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_concurrent_ues100' time='MASKED'/>
   <testcase classname='EPDG_Tests' name='TC_upf_echo_req' time='MASKED'/>