Merge pull request #681 from mcornea/json_harden

Fix wait for nodes to be discovered race condition

Author: openshift-merge-bot[bot]

ansible/roles/wait-hosts-discovered/tasks/main.yml

@@ -18,7 +18,9 @@
     status_code: [200, 201]
     return_content: true
   register: cluster
-  until: cluster.json.hosts | length == inventory_nodes | length
+  until:
+    - cluster.json is defined
+    - cluster.json.hosts | length == inventory_nodes | length
   retries: 40
   delay: 60