OpenStack port decorator variables
OpenStack port decorator variables

The OpenStack port binding_host_id attribute is modifiable,
but an error will be reported when calling ‘def create_port’
of the OpenStack SDK, because the binding: host_id variable
does not exist in ‘@_utils’ and the binding_host_id attribute
cannot be changed.

Change-Id: I56edd53f7cb4fa702922e3e34c24fdfed98083e4

stackforge/python-openstacksdk,stackforge/python-openstacksdk