Updated openstack/openstack
Project: openstack/keystone  67b474f4ba3428eca97a4a6faaaba5951253f236

Remove unused _validate_endpoint

The _validate_endpoint method in keystone.catalog.controllers was
unused and unnecessary since we've got JSON Schema-based
validation.

Change-Id: I16228c0b9a88b5a05567c7021320081b8081b68b