Correct Pool Object
Correct Pool Object

* remove required flag on pool attributes

Change-Id: Ie8013a47c2da178b3cc2644fc1f8ddb5f9f61db2

cneill/designate,ramsateesh/designate,openstack/designate,grahamhayes/designate,muraliselva10/designate,cneill/designate,muraliselva10/designate,ionrock/designate,cneill/designate-testing,tonyli71/designate,kiall/designate-py3,cneill/designate,tonyli71/designate,cneill/designate,openstack/designate,cneill/designate-testing,ramsateesh/designate,grahamhayes/designate,ionrock/designate,muraliselva10/designate,kiall/designate-py3,tonyli71/designate,ramsateesh/designate,kiall/designate-py3,cneill/designate,grahamhayes/designate,ionrock/designate,kiall/designate-py3,kiall/designate-py3,openstack/designate,cneill/designate-testing