coreos-cincinnati: revert image related changes in template

As the previous change took no effect and the error while executing
`sudo rbac-playbook -l os_control_stg openshift-apps/coreos-cincinnati.yml`
continues to return an error as below, let's try another aproach.
```
"stderr": "The Deployment \"coreos-cincinnati\" is invalid: \n*
spec.template.spec.containers[0].image: Required value
```

Here adding a specific F42 image

roles/openshift-apps/coreos-cincinnati/templates/deployment.yml.j2

@@ -31,6 +31,8 @@ spec:
             "-v",
             "-c", "/etc/cincinnati/graph-builder.toml",
           ]
+          image: "coreos-cincinnati-img:latest"
+          imagePullPolicy: IfNotPresent
           volumeMounts:
             - name: stub-config
               mountPath: /etc/cincinnati/
@@ -41,6 +43,8 @@ spec:
             "-v",
             "-c", "/etc/cincinnati/policy-engine.toml",
           ]
+          image: "coreos-cincinnati-img:latest"
+          imagePullPolicy: IfNotPresent
           volumeMounts:
             - name: stub-config
               mountPath: /etc/cincinnati/