Return empty list when there is no matching resource instsnce items to return

kubernetes/base/dynamic/resource.py

@@ -291,6 +291,8 @@ class ResourceInstance(object):
         kind = instance['kind']
         if kind.endswith('List') and 'items' in instance:
             kind = instance['kind'][:-4]
+            if not instance['items']:
+                instance['items'] = []
             for item in instance['items']:
                 if 'apiVersion' not in item:
                     item['apiVersion'] = instance['apiVersion']