add cert-manager to different namespace in test_helmreleases

test/pytest/test_helmreleases.py

@@ -12,8 +12,10 @@ from kubernetes import client, config
 from kubernetes.client.rest import ApiException
 
 EXPECTED_RELEASES = {
+    'cert-manager': [
+        'cert-manager'
+    ],
     'oas': [
-        'cert-manager',
         'ingress',
         'local-storage',
         'prometheus',