pgw: Introduce test TC_gy_ccr_update_rejected

This test currently fails because open5gs-smfd is not triggering the
tear down in smf_gy_handle_cca_update_request().

Related: SYS#6845
Change-Id: Ie58ae2a5e870b183fa1c56c90c94f5eee56386e0
diff --git a/pgw/expected-results.xml b/pgw/expected-results.xml
index 20c073b..913f669 100644
--- a/pgw/expected-results.xml
+++ b/pgw/expected-results.xml
@@ -7,6 +7,7 @@
   <testcase classname='PGW_Tests' name='TC_createSession_deleteSession' time='MASKED'/>
   <testcase classname='PGW_Tests' name='TC_deleteSession_unknown' time='MASKED'/>
   <testcase classname='PGW_Tests' name='TC_gy_charging_cc_time' time='MASKED'/>
+  <testcase classname='PGW_Tests' name='TC_gy_ccr_update_rejected' time='MASKED'/>
   <testcase classname='PGW_Tests' name='TC_s2b_createSession_v4_noapco' time='MASKED'/>
   <testcase classname='PGW_Tests' name='TC_s2b_createSession_v4_apco' time='MASKED'/>
 </testsuite>