Add fetch revocations for v3

There was no API to fetch revocations using v3.

bp auth-token-use-client

Change-Id: I82c5f3e475187d0961bf30b4fc71b57e288dcf09

keystoneclient/tests/v3/test_tokens.py

@@ -33,3 +33,10 @@ class TokenTests(utils.TestCase):
         self.stub_url('DELETE', ['/auth/tokens'], status_code=204)
         self.client.tokens.revoke_token(token)
         self.assertRequestHeaderEqual('X-Subject-Token', token_id)
+
+    def test_get_revoked(self):
+        sample_revoked_response = {'signed': '-----BEGIN CMS-----\nMIIB...'}
+        self.stub_url('GET', ['auth', 'tokens', 'OS-PKI', 'revoked'],
+                      json=sample_revoked_response)
+        resp = self.client.tokens.get_revoked()
+        self.assertEqual(sample_revoked_response, resp)

keystoneclient/v3/tokens.py

@@ -34,3 +34,14 @@ class TokenManager(object):
             token_id = base.getid(token)
         headers = {'X-Subject-Token': token_id}
         return self._client.delete('/auth/tokens', headers=headers)
+
+    def get_revoked(self):
+        """Get revoked tokens list.
+
+        :returns: A dict containing "signed" which is a CMS formatted string.
+        :rtype: dict
+
+        """
+
+        resp, body = self._client.get('/auth/tokens/OS-PKI/revoked')
+        return body