Fix error during set unicode metadata key

Change-Id: I2940670b4174dae800e76667ceecc80c568e613f
Closes-Bug: #1622631

cinderclient/openstack/common/apiclient/base.py

@@ -491,14 +491,17 @@ class Resource(RequestIdMixin):
     def _add_details(self, info):
         for (k, v) in six.iteritems(info):
             try:
-                setattr(self, k, v)
+                try:
+                    setattr(self, k, v)
+                except UnicodeEncodeError:
+                    pass
                 self._info[k] = v
             except AttributeError:
                 # In this case we already defined the attribute on the class
                 pass
 
     def __getattr__(self, k):
-        if k not in self.__dict__:
+        if k not in self.__dict__ or k not in self._info:
             # NOTE(bcwaldon): disallow lazy-loading if already loaded once
             if not self.is_loaded():
                 self.get()
@@ -506,7 +509,9 @@ class Resource(RequestIdMixin):
 
             raise AttributeError(k)
         else:
-            return self.__dict__[k]
+            if k in self.__.dict__:
+                return self.__dict__[k]
+            return self._info[k]
 
     @property
     def api_version(self):

cinderclient/tests/unit/v2/test_volumes.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Copyright (c) 2013 OpenStack Foundation
 #
 # All Rights Reserved.
@@ -171,9 +172,9 @@ class VolumesTest(utils.TestCase):
         self._assert_request_id(vol)
 
     def test_set_metadata(self):
-        vol = cs.volumes.set_metadata(1234, {'k1': 'v2'})
+        vol = cs.volumes.set_metadata(1234, {'k1': 'v2', 'тест': 'тест'})
         cs.assert_called('POST', '/volumes/1234/metadata',
-                         {'metadata': {'k1': 'v2'}})
+                         {'metadata': {'k1': 'v2', 'тест': 'тест'}})
         self._assert_request_id(vol)
 
     def test_delete_metadata(self):