Should not use mutable default arguments in function definitions

[Wang Bo]

Refer to: http://docs.python-guide.org/en/latest/writing/gotchas/.
We should not use mutable default arguments in function definitions.

So we need remove the default arguments "[]" and "{}" in function definitions. "[]" has been removed in patch: https://review.openstack.org/#/c/256931/2. We also need fix the code incorrectly using "{}".

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/257677

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/257677
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=7e02c996e8f338c557958ddfcc794d2432f83215
Submitter: Jenkins
Branch: master

commit 7e02c996e8f338c557958ddfcc794d2432f83215
Author: Bo Wang <email address hidden>
Date: Tue Dec 15 12:13:17 2015 +0800

    Remove arguments "{}" in function definitions

    remove mutable default arguments "{}" in function definitions
    refer to:http://docs.python-guide.org/en/latest/writing/gotchas/

    Close-Bug: #1526140

    Change-Id: Ib85bd0238beaac95c53d9ae1779a5d566db9eb16