Add fetch revocations for v2.0

There was no API to fetch revocations using v2.0.

bp auth-token-use-client

Change-Id: Ica5aae5b9075180223268fb6b2ef11e00dfd057f

keystoneclient/tests/v2_0/test_tokens.py

@@ -160,3 +160,10 @@ class TokenTests(utils.TestCase):
         self.assertIsInstance(token_ref, tokens.Token)
         self.assertEqual(token_fixture.token_id, token_ref.id)
         self.assertEqual(token_fixture.expires_str, token_ref.expires)
+
+    def test_get_revoked(self):
+        sample_revoked_response = {'signed': '-----BEGIN CMS-----\nMIIB...'}
+        self.stub_url('GET', ['tokens', 'revoked'],
+                      json=sample_revoked_response)
+        resp = self.client.tokens.get_revoked()
+        self.assertEqual(sample_revoked_response, resp)

keystoneclient/v2_0/tokens.py

@@ -72,3 +72,13 @@ class TokenManager(base.Manager):
 
     def endpoints(self, token):
         return self._get("/tokens/%s/endpoints" % base.getid(token), "token")
+
+    def get_revoked(self):
+        """Returns the revoked tokens response.
+
+        The response will be a dict containing 'signed' which is a CMS-encoded
+        document.
+
+        """
+        resp, body = self.client.get('/tokens/revoked')
+        return body