Propose Designate for Incubation

Incubation and Program applications at [1] and [2]

[1]: https://wiki.openstack.org/wiki/Designate/Incubation_Application
[2]: https://wiki.openstack.org/wiki/Designate/Program_Application

Change-Id: I264f2bfab2abb19e38f9a0893951ca13d94e9726
Merge "Propose Designate for Incubation"