Use openstack/requirements for designate
Use openstack/requirements for designate

See Iccb4e99f8e4b6659a19c1817d0f4c697824af25c for context.

Change-Id: I07ed5f20ab4b4bcd0fc6b3c231a54ebe0d51bf67
Partial-Bug: #150530

limamauricio/mykolla,GalenMa/kolla,toby82/kolla,intel-onp/kolla,coolsvap/kolla,rajalokan/kolla,rahulunair/kolla,rajalokan/kolla,mrangana/kolla,dardelean/kolla-ansible,coolsvap/kolla,mrangana/kolla,openstack/kolla,GalenMa/kolla,rajalokan/kolla,tonyli71/kolla,limamauricio/mykolla,rahulunair/kolla,toby82/kolla,mandre/kolla,intel-onp/kolla,mandre/kolla,coolsvap/kolla,toby82/kolla,tonyli71/kolla,openstack/kolla,limamauricio/mykolla,negronjl/kolla,stackforge/kolla,negronjl/kolla,dardelean/kolla-ansible,negronjl/kolla,stackforge/kolla,mandre/kolla,nihilifer/kolla,dardelean/kolla-ansible,nihilifer/kolla,stackforge/kolla