Update sts integration tests

Also touched up endpoint code.

botocore/endpoint.py

@@ -290,11 +290,6 @@ def create_endpoint(self, service_model, region_name=None, is_secure=True,
                 endpoint = {'uri': endpoint_url, 'properties': {}}
             else:
                 raise
-        # We only support the credentialScope.region in the properties
-        # bag right now, so if it's available, it will override the
-        # provided region name.
-        region_name_override = endpoint['properties'].get(
-            'credentialScope', {}).get('region')
 
         region_name = self._determine_region_name(endpoint, region_name,
                                                   endpoint_url)

tests/integration/test_sts.py

@@ -20,6 +20,12 @@ def setUp(self):
         self.session = botocore.session.get_session()
 
     def test_regionalized_endpoints(self):
+
+        sts = self.session.create_client('sts', region_name='ap-southeast-1')
+        response = sts.get_session_token()
+        # Do not want to be revealing any temporary keys if the assertion fails
+        self.assertIn('Credentials', response.keys())
+
         # Since we have to activate STS regionalization, we will test
         # that you can send an STS request to a regionalized endpoint
         # by making a call with the explicitly wrong region name
@@ -36,6 +42,13 @@ def test_regionalized_endpoints_operation(self):
         # but this type of integration testing (non customized) should
         # be done at the botocore level.
         sts = self.session.get_service('sts')
+
+        endpoint = sts.get_endpoint(region_name='ap-southeast-1')
+        operation = sts.get_operation('GetSessionToken')
+        http, response = operation.call(endpoint)
+        # Do not want to be revealing any temporary keys if the assertion fails
+        self.assertIn('Credentials', response.keys())
+
         endpoint = sts.get_endpoint(
             region_name='ap-southeast-1',
             endpoint_url='https://sts.us-west-2.amazonaws.com')