Prefer () to continue line per PEP8

There were some long lines that were split using \ rather than ().
PEP8 recommends using () --
http://legacy.python.org/dev/peps/pep-0008/#maximum-line-length

Change-Id: I8e140e507d0d9991094be13ebafa7fc700c1a02e

keystoneclient/generic/client.py

@@ -97,8 +97,8 @@ class Client(httpclient.HTTPClient):
                         results['message'] = "Keystone found at %s" % url
                         version = body['version']
                         # Stable/diablo incorrect format
-                        id, status, version_url = \
-                            self._get_version_info(version, url)
+                        id, status, version_url = (
+                            self._get_version_info(version, url))
                         results[str(id)] = {"id": id,
                                             "status": status,
                                             "url": version_url}
@@ -107,8 +107,8 @@ class Client(httpclient.HTTPClient):
                         # Correct format
                         results['message'] = "Keystone found at %s" % url
                         for version in body['versions']['values']:
-                            id, status, version_url = \
-                                self._get_version_info(version, url)
+                            id, status, version_url = (
+                                self._get_version_info(version, url))
                             results[str(id)] = {"id": id,
                                                 "status": status,
                                                 "url": version_url}

keystoneclient/middleware/auth_token.py

@@ -488,13 +488,13 @@ class AuthProtocol(object):
         self._cache_pool = None
         self._cache_initialized = False
         # memcache value treatment, ENCRYPT or MAC
-        self._memcache_security_strategy = \
-            self._conf_get('memcache_security_strategy')
+        self._memcache_security_strategy = (
+            self._conf_get('memcache_security_strategy'))
         if self._memcache_security_strategy is not None:
-            self._memcache_security_strategy = \
-                self._memcache_security_strategy.upper()
-        self._memcache_secret_key = \
-            self._conf_get('memcache_secret_key')
+            self._memcache_security_strategy = (
+                self._memcache_security_strategy.upper())
+        self._memcache_secret_key = (
+            self._conf_get('memcache_secret_key'))
         self._assert_valid_memcache_protection_config()
         # By default the token will be cached for 5 minutes
         self.token_cache_time = int(self._conf_get('token_cache_time'))
@@ -506,8 +506,8 @@ class AuthProtocol(object):
         self.http_connect_timeout = (http_connect_timeout_cfg and
                                      int(http_connect_timeout_cfg))
         self.auth_version = None
-        self.http_request_max_retries = \
-            self._conf_get('http_request_max_retries')
+        self.http_request_max_retries = (
+            self._conf_get('http_request_max_retries'))
 
         self.include_service_catalog = self._conf_get(
             'include_service_catalog')

keystoneclient/tests/test_auth_token_middleware.py

@@ -581,8 +581,8 @@ class CommonAuthTokenMiddlewareTest(object):
         tmp_name = uuid.uuid4().hex
         test_parent_signing_dir = "/tmp/%s" % tmp_name
         self.middleware.signing_dirname = "/tmp/%s/%s" % ((tmp_name,) * 2)
-        self.middleware.signing_cert_file_name = "%s/test.pem" % \
-            self.middleware.signing_dirname
+        self.middleware.signing_cert_file_name = (
+            "%s/test.pem" % self.middleware.signing_dirname)
         self.middleware.verify_signing_dir()
         # NOTE(wu_wenxiang): Verify if the signing dir was created as expected.
         self.assertTrue(os.path.isdir(self.middleware.signing_dirname))
@@ -1385,8 +1385,8 @@ class v2AuthTokenMiddlewareTest(BaseAuthTokenMiddlewareTest,
     def test_request_prevent_service_catalog_injection(self):
         req = webob.Request.blank('/')
         req.headers['X-Service-Catalog'] = '[]'
-        req.headers['X-Auth-Token'] = \
-            self.examples.UUID_TOKEN_NO_SERVICE_CATALOG
+        req.headers['X-Auth-Token'] = (
+            self.examples.UUID_TOKEN_NO_SERVICE_CATALOG)
         body = self.middleware(req.environ, self.start_fake_response)
         self.assertEqual(self.response_status, 200)
         self.assertFalse(req.headers.get('X-Service-Catalog'))

keystoneclient/tests/v2_0/test_auth.py

@@ -54,16 +54,16 @@ class AuthenticateAgainstKeystoneTests(utils.TestCase):
     @httpretty.activate
     def test_authenticate_success_expired(self):
         # Build an expired token
-        self.TEST_RESPONSE_DICT['access']['token']['expires'] = \
-            (timeutils.utcnow() - datetime.timedelta(1)).isoformat()
+        self.TEST_RESPONSE_DICT['access']['token']['expires'] = (
+            (timeutils.utcnow() - datetime.timedelta(1)).isoformat())
 
         exp_resp = httpretty.Response(body=json.dumps(self.TEST_RESPONSE_DICT),
                                       content_type='application/json')
 
         # Build a new response
         TEST_TOKEN = "abcdef"
-        self.TEST_RESPONSE_DICT['access']['token']['expires'] = \
-            '2020-01-01T00:00:10.000123Z'
+        self.TEST_RESPONSE_DICT['access']['token']['expires'] = (
+            '2020-01-01T00:00:10.000123Z')
         self.TEST_RESPONSE_DICT['access']['token']['id'] = TEST_TOKEN
 
         new_resp = httpretty.Response(body=json.dumps(self.TEST_RESPONSE_DICT),