ggsn: Introduce test TC_pdp_act2_recovery

Some code is moved out of f_pdp_ctx_act() into f_handle_create_req() in
order to re-use it in the test.

Related: OS#4165
Change-Id: I48c1bc9287ce8b820e5ea672dffbc5a8503f16d7
diff --git a/ggsn_tests/expected-results.xml b/ggsn_tests/expected-results.xml
index c31c14a..baa5b1f 100644
--- a/ggsn_tests/expected-results.xml
+++ b/ggsn_tests/expected-results.xml
@@ -23,6 +23,7 @@
   <testcase classname='GGSN_Tests' name='TC_pdp46_clients_interact' time='MASKED'/>
   <testcase classname='GGSN_Tests' name='TC_pdp46_act_deact_apn4' time='MASKED'/>
   <testcase classname='GGSN_Tests' name='TC_echo_req_resp' time='MASKED'/>
+  <testcase classname='GGSN_Tests' name='TC_pdp_act2_recovery' time='MASKED'/>
   <testcase classname='GGSN_Tests' name='TC_act_deact_retrans_duplicate' time='MASKED'/>
   <testcase classname='GGSN_Tests' name='TC_pdp_act_restart_ctr_echo' time='MASKED'/>
 </testsuite>