Update image checking test case to just validate iso and qcow2
Update image checking test case to just validate iso and qcow2

jkozol/welder-web,weldr/welder-web,weldr/welder-web,jkozol/welder-web,jkozol/welder-web,weldr/welder-web,weldr/welder-web,jkozol/welder-web