fix for Issue 31

#31 (closed) : The TC expects for pass (pi = null) which seems not to be required here. Please remove nullField := {"parentID"} from match template.

OneM2M_Testcases_CSE_Release_1.ttcn

@@ -1901,7 +1901,7 @@ module OneM2M_Testcases_CSE_Release_1 {
tc_ac.start;
alt {
-						[] mcaPort.receive(mw_response(mw_responsePrimitive(int2000, v_contentResponse), {"parentID"})) -> value v_response {
+						[] mcaPort.receive(mw_response(mw_responsePrimitive(int2000, v_contentResponse))) -> value v_response {
tc_ac.stop;
setverdict(pass, __SCOPE__ & ": Response OK for retrieving");
}