Fix nova-manage image_property show unexpected keyword

Reproduction steps:
1. Execute: nova-manage image_property show <vm_uuid> \
                            hw_vif_multiqueue_enabled
2. Observe:
  An error has occurred:
  Traceback (most recent call last):
    File "/var/lib/kolla/venv/lib/python3.9/
          site-packages/nova/cmd/manage.py", line 3394, in main
      ret = fn(*fn_args, **fn_kwargs)
  TypeError: show() got an unexpected keyword argument 'property'

Change-Id: I1349b880934ad9f44a943cf7de324d7338619d2e
Closes-Bug: #2016346
(cherry picked from commit 1c02c0d)
(cherry picked from commit fc4b592)
(cherry picked from commit 1bbd44e)

Author: robertbreker

nova/cmd/manage.py

@@ -3195,7 +3195,7 @@ class ImagePropertyCommands:
         'instance_uuid', metavar='<instance_uuid>',
         help='UUID of the instance')
     @args(
-        'property', metavar='<image_property>',
+        'image_property', metavar='<image_property>',
         help='Image property to show')
     def show(self, instance_uuid=None, image_property=None):
         """Show value of a given instance image property.
@@ -3213,10 +3213,10 @@ def show(self, instance_uuid=None, image_property=None):
             with context.target_cell(ctxt, im.cell_mapping) as cctxt:
                 instance = objects.Instance.get_by_uuid(
                     cctxt, instance_uuid, expected_attrs=['system_metadata'])
-                image_property = instance.system_metadata.get(
+                property_value = instance.system_metadata.get(
                     f'image_{image_property}')
-                if image_property:
-                    print(image_property)
+                if property_value:
+                    print(property_value)
                     return 0
                 else:
                     print(f'Image property {image_property} not found '