Remove unused/mutable default args

Having mutable default args is a bad idea
(http://docs.python-guide.org/en/latest/writing/gotchas/#mutable-default-arguments).

Change-Id: I4a51c1aea04a1d2fd1e03e72a0594d2ee80eb921
Updated from global requirements

Change-Id: If0d58de9daeb46b5190d0c568a590d883aeac9e9
Merge "Remove unused/mutable default args"
Imported Translations from Transifex

Change-Id: If50e6cac440d42f888448959aad337cb341a977c
Imported Translations from Transifex

Change-Id: Id06bb974dba0f29720be3650986bb04e23a2c5e0