handling_nested_lookups from class to instacse var
handling_nested_lookups from class to instacse var

In order handle_nested_lookup method to work properly, the
handling_nested_lookups key should be depends on 'Lookup' instanses
and not on the class.

redhat-openstack/infrared,redhat-openstack/infrared,okolisny/InfraRed,okolisny/InfraRed,redhat-openstack/infrared,okolisny/InfraRed