Python 3: dict.iteritems()
Python 3: dict.iteritems()

Replace dict.iteritems() with dict.items(). The Python 3 dict
type has no iteritems() method, the old iteritems() method was
renamed to items().

Change-Id: I16c3dc5d56c074097d7cdda6635796cdc9d851e3

openstack/designate,openstack/designate,openstack/designate