Lowers the default num of shards for Rackspace DNS from 500 to 400
Lowers the default num of shards for Rackspace DNS from 500 to 400

Change-Id: I4e852b83432e4362145457aa78a207d8d7f3b545

stackforge/poppy,openstack/poppy,obulpathi/poppy,obulpathi/poppy,obulpathi/poppy,stackforge/poppy,stackforge/poppy,openstack/poppy,openstack/poppy