master ignitions fails in Openshift on Openstack UPI install fails with Traceback (most recent call last): File "<string>", line 3, in <module> KeyError: 'storage'

Issue

• While applying this script:

python -c "import base64, json, sys;
    python -c "import base64, json, sys;
ignition = json.load(sys.stdin);
ignition = json.load(sys.stdin);
files = ignition['storage'].get('files', []);
storage = ignition.get('storage', {});
files.append({'path': '/etc/hostname', 'mode': 420, 'contents': {'source': 'data:text/plain;charset=utf-8;base64,' + base64.standard_b64encode(b'$MASTER_HOSTNAME').decode().strip()}});
files = storage.get('files', []);
ignition['storage']['files'] = files;
files.append({'path': '/etc/hostname', 'mode': 420, 'contents': {'source': 'data:text/plain;charset=utf-8;base64,' + base64.standard_b64encode(b'$MASTER_HOSTNAME').decode().strip(), 'verification': {}}, 'filesystem': 'root'});
storage['files'] = files;
ignition['storage'] = storage
json.dump(ignition, sys.stdout)" <master.ign

• Python fails with:

Traceback (most recent call last):
  File "<string>", line 3, in <module>
KeyError: 'storage' 

• The 'storage' property does not seem to be present any more in the master ignition file.