Rename service client classes which include "Ip"

FloatingIPsClient and FixedIPsClient classes contain "IP" which means
"Internet Protocol" in their names, but FloatingIpPoolsClient and
FloatingIPsBulkClient contain "Ip" as the same meaning.
To make class names consistent, this patch renames later classes for
including "IP" instead.

Partially implements blueprint consistent-service-method-names

Change-Id: Ia16e8d29ac3972bf3c46bb9af07ca3f94c576620
4 files changed