sgsn: Add test to verify restart_ctr during echo req/reply.

Currently test doesn't fully work because it doesn't match the PDP CTX
DEL REQ correctly.

Change-Id: I1dcb250dba2079c14b857c0b89a02ac21d1c591f
diff --git a/sgsn/expected-results.xml b/sgsn/expected-results.xml
index 1949199..f2f2500 100644
--- a/sgsn/expected-results.xml
+++ b/sgsn/expected-results.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<testsuite name='Titan' tests='25' failures='5' errors='3' skipped='0' inconc='0' time='MASKED'>
+<testsuite name='Titan' tests='26' failures='5' errors='3' skipped='0' inconc='0' time='MASKED'>
   <testcase classname='SGSN_Tests' name='TC_attach' time='MASKED'/>
   <testcase classname='SGSN_Tests' name='TC_attach_mnc3' time='MASKED'/>
   <testcase classname='SGSN_Tests' name='TC_attach_umts_aka_umts_res' time='MASKED'/>
@@ -65,4 +65,5 @@
   <testcase classname='SGSN_Tests' name='TC_attach_second_attempt' time='MASKED'>
     <error type='DTE'></error>
   </testcase>
+  <testcase classname='SGSN_Tests' name='TC_attach_restart_ctr_dettach' time='MASKED'/>
 </testsuite>