Ran black and pylint on files.

release_tests/support/cluster.py

@@ -3,7 +3,8 @@
 from release_tests.support.mttserver import MTTServer
 from release_tests.support.translate import Translate
 
-class Cluster():
+
+class Cluster:
     """cluster of MoreThanText."""
 
     def __init__(self, num=2):

release_tests/support/test_cluster.py

@@ -4,6 +4,7 @@ from unittest import IsolatedAsyncioTestCase
 from aiohttp import ClientSession
 from release_tests.support.cluster import Cluster
 
+
 class ClusterTC(IsolatedAsyncioTestCase):
     """Test for the MoreThanText cluster."""
 

release_tests/support/translate.py

@@ -7,7 +7,7 @@ from release_tests.support import ADDR, get_port
 class Translate:
     """Creates a translation mock for release testing."""
 
-    def __init__(self, url="/", replies=[]):
+    def __init__(self, url="/", replies=None):
         """Initialize"""
 
         if not replies: