Make v2 for identity_client functions use **kwargs

As we discussed on
http://lists.openstack.org/pipermail/openstack-dev/2015-July/068864.html
All http POST/PUT methods need to contain **kwargs as their arguments.

This patch makes update_user_password, update_user_own_password,
enable_disable_user of v2 identity_client use **kwargs.

Partially implements blueprint consistent-service-method-names

Change-Id: I53fd646bbbee6d8de030d72f0c244c756e772e27
4 files changed