TT#163700 scenarios_pbx fixes

* incoming_shared_line: update flows
* invite_group_[parallel|serial] disable nat_ping

Change-Id: I2a966bf3b1bc1c0372cb9083baaaa36c1e06b7c8

scenarios_pbx/incoming_shared_line/0022_test.yml.tt2

@@ -9,6 +9,10 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_INITVARS:
   - return|ROUTE_INITVARS:
+  - start|ROUTE_STOP_RTPPROXY:
+  - start|ROUTE_RESTORE_CLUSTERSET:
+  - return|ROUTE_RESTORE_CLUSTERSET:
+  - return|ROUTE_STOP_RTPPROXY:
   - start|ROUTE_LOCAL:
   - start|ROUTE_EXIT:
   - start|ROUTE_RUNTIME:

scenarios_pbx/invite_group_parallel/prefs.json.tt2

@@ -0,0 +1,5 @@
+{
+  "@invite-group-parallel.scenarios-pbx.testt": {
+    "nat_sipping": "no"
+  }
+}

scenarios_pbx/invite_group_serial/prefs.json.tt2

@@ -0,0 +1,5 @@
+{
+  "@invite-group-serial.scenarios-pbx.test": {
+    "nat_sipping": "no"
+  }
+}