Wrap GroupType class's function with api_version

GroupType class's functions only support 3.11
microversion or higher. So it should be wrapped like
like one[1], otherwise these fuctions may be exposed
to lib users with old microversion.

[1]: https://github.com/openstack/python-cinderclient/blob/master/cinderclient/v3/services.py#L82
Closes-bug: #1619105

Change-Id: I08563898cb1a1eb212973e88a87ed1248f43fa77

cinderclient/tests/unit/v3/test_group_types.py

@@ -21,6 +21,7 @@ from cinderclient.tests.unit import utils
 from cinderclient.tests.unit.v3 import fakes
 
 cs = fakes.FakeClient(api_version=api_versions.APIVersion('3.11'))
+pre_cs = fakes.FakeClient(api_version=api_versions.APIVersion('3.10'))
 
 
 class GroupTypesTest(utils.TestCase):
@@ -33,8 +34,6 @@ class GroupTypesTest(utils.TestCase):
             self.assertIsInstance(t, group_types.GroupType)
 
     def test_list_group_types_pre_version(self):
-        pre_cs = fakes.FakeClient(api_version=
-                                  api_versions.APIVersion('3.10'))
         self.assertRaises(exc.VersionNotFoundForAPIMethod,
                           pre_cs.group_types.list)
 
@@ -95,6 +94,11 @@ class GroupTypesTest(utils.TestCase):
                          {'group_specs': {'k': 'v'}})
         self._assert_request_id(res)
 
+    def test_set_key_pre_version(self):
+        t = group_types.GroupType(pre_cs, {'id': 1})
+        self.assertRaises(exc.VersionNotFoundForAPIMethod,
+             t.set_keys, {'k': 'v'})
+
     def test_unset_keys(self):
         t = cs.group_types.get(1)
         res = t.unset_keys(['k'])

cinderclient/v3/group_types.py

@@ -33,6 +33,7 @@ class GroupType(base.Resource):
         return self._info.get("is_public",
                               self._info.get("is_public", 'N/A'))
 
+    @api_versions.wraps("3.11")
     def get_keys(self):
         """Get group specs from a group type.
 
@@ -43,6 +44,7 @@ class GroupType(base.Resource):
             base.getid(self))
         return body["group_specs"]
 
+    @api_versions.wraps("3.11")
     def set_keys(self, metadata):
         """Set group specs on a group type.
 
@@ -56,6 +58,7 @@ class GroupType(base.Resource):
             "group_specs",
             return_raw=True)
 
+    @api_versions.wraps("3.11")
     def unset_keys(self, keys):
         """Unset specs on a group type.