Deprecate import_image

This option was added because of a known issue in WSGI mode[1] which
was fixed during Vicotria release. Now the latest tempest supports Zed
and later we can start removing the option.

[1] https://bugs.launchpad.net/glance/+bug/1888713

Change-Id: Id75c7f5846575fba7e2494bc3182ce65b0892c47

releasenotes/notes/deprecate-import_image-e8c627aab833b64d.yaml

@@ -0,0 +1,12 @@
+---
+upgrade:
+  - |
+    Default value of the ``[image-feature-enabled] image_import`` has been
+    changed from ``False`` to ``True``, and now the image import feature is
+    tested by default.
+
+deprecations:
+  - |
+    The ``[image-feature-enabled] image_import`` option has been deprecated.
+    The image import feature works in both standalone mode and WSGI mode since
+    Victoria and the image import feature can be always tested.

tempest/config.py

@@ -684,12 +684,13 @@ ImageFeaturesGroup = [
                                   'are current one. In future, Tempest will '
                                   'test v2 APIs only so this config option '
                                   'will be removed.'),
-    # Image import feature is setup in devstack victoria onwards.
-    # Once all stable branches setup the same via glance standalone
-    # mode or with uwsgi, we can remove this config option.
     cfg.BoolOpt('import_image',
-                default=False,
+                default=True,
-                help="Is image import feature enabled"),
+                help="Is image import feature enabled",
+                deprecated_for_removal=True,
+                deprecated_reason='Issue with image import in WSGI mode was '
+                                  'fixed in Victoria, and this feature works '
+                                  'in any deployment architecture now.'),
     cfg.BoolOpt('os_glance_reserved',
                 default=True,
                 help="Should we check that os_glance namespace is reserved",