* sipp_scenario00.xml => sipp_scenario00.msg
sipp_scenario_responder00.xml => sipp_scenario_responder00.msg
so sipp_scenario00_test.yml.tt2 and sipp_scenario_reponder00_test.yml.tt2
makes more sense
Change-Id: Iab9db5122774dbc32101195e639ab6fef9b23236