fix(tests/integration/standard/test_cluster.py): Fixing "DeprecationWarning: invalid escape sequence \" warning

Author: Orenef11

tests/integration/standard/test_cluster.py

@@ -150,7 +150,8 @@ def test_raise_error_on_control_connection_timeout(self):
         get_node(1).pause()
         cluster = TestCluster(contact_points=['127.0.0.1'], connect_timeout=1)
 
-        with self.assertRaisesRegexp(NoHostAvailable, "OperationTimedOut\('errors=Timed out creating connection \(1 seconds\)"):
+        with self.assertRaisesRegexp(NoHostAvailable,
+                                     r"OperationTimedOut\('errors=Timed out creating connection \(1 seconds\)"):
             cluster.connect()
         cluster.shutdown()