Make server action methods[f-l] 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 server action methods[f-l] use **kwargs.

Partially implements blueprint consistent-service-method-names

Change-Id: Iacaccf91392b5efab3f78d1f8cf1abf4dacfbe84
7 files changed