Ensure default arguments are not mutable

* add hacking check: no_mutable_default_args()
* remove the mutable default arguments "[]" or "{}" when the function
  is defined.

ref: http://docs.python-guide.org/en/latest/writing/gotchas/

Closes-Bug: #1530282
Change-Id: Ice6f7654211b73d7f8bc3ca0e4dfae3dca354397

HACKING.rst

@@ -26,6 +26,7 @@ Imports
 Dictionaries/Lists
 ------------------
 
+- [S360] Ensure default arguments are not mutable.
 - [S368] Must use a dict comprehension instead of a dict constructor with a
          sequence of key-value pairs. For more information, please refer to
          http://legacy.python.org/dev/peps/pep-0274/