Remove unnecessary overrides in Subnetpool OVO
Remove unnecessary overrides in Subnetpool OVO

The implementation of Subnetpool OVO overrides get_object and
get_objects methods when it's not required. This patch removes
overridden methods and modifies the overrided create and update
methods to standarize them.

Change-Id: I3a85654afa48f997b96d008a860221dc733a991e
Partially-Implements: blueprint adopt-oslo-versioned-objects-for-db

huntxu/neutron,openstack/neutron,eayunstack/neutron,eayunstack/neutron,noironetworks/neutron,openstack/neutron,noironetworks/neutron,mahak/neutron,mahak/neutron,mahak/neutron,openstack/neutron,huntxu/neutron