Add self to validator method

This patchset allows access to extension class instance for more
advanced command validation.

Change-Id: I9d6df1ab44ab06ef2e663ad777ad3560d9ab7565

ironic_python_agent/decorators.py

@@ -28,7 +28,7 @@ def async_command(validator=None):
             # Run a validator before passing everything off to async.
             # validators should raise exceptions or return silently.
             if validator:
-                validator(**command_params)
+                validator(self, **command_params)
 
             # bind self to func so that AsyncCommandResult doesn't need to
             # know about the mode

ironic_python_agent/standby.py

@@ -133,7 +133,7 @@ def _verify_image(image_info, image_location):
     return False
 
 
-def _validate_image_info(image_info=None, **kwargs):
+def _validate_image_info(ext, image_info=None, **kwargs):
     image_info = image_info or {}
 
     for field in ['id', 'urls', 'hashes']:

ironic_python_agent/tests/standby.py

@@ -45,7 +45,7 @@ class TestStandbyExtension(test_base.BaseTestCase):
         }
 
     def test_validate_image_info_success(self):
-        standby._validate_image_info(self._build_fake_image_info())
+        standby._validate_image_info(None, self._build_fake_image_info())
 
     def test_validate_image_info_missing_field(self):
         for field in ['id', 'urls', 'hashes']: