Try to remove a round-off error causing a test mock failure

Author: vchudnov-g

tests/unit/gapic/test_method.py

@@ -198,10 +198,11 @@ def test_wrap_method_with_overriding_timeout_as_a_number():
         method, default_retry, default_timeout
     )
 
-    result = wrapped_method(timeout=22)
+    timeout = 22
+    result = wrapped_method(timeout=timeout)
 
     assert result == 42
-    method.assert_called_once_with(timeout=22, metadata=mock.ANY)
+    method.assert_called_once_with(timeout=timeout, metadata=mock.ANY)
 
 
 def test_wrap_method_with_call():