openshift-apps: kerneltest: point s2i at the WSGI app

roles/openshift-apps/kerneltest/files/deploymentconfig.yml

@@ -28,6 +28,8 @@ items:
           env:
             - name: KERNELTEST_CONFIG
               value: /etc/kerneltest/config.toml
+            - name: APP_MODULE
+              value: "kerneltest.wsgi:application"
           ports:
           - containerPort: 8080
           resources: {}