cloudcare should use the latest starred build

a bit embarassing this took so long to implement

http://manage.dimagi.com/default.asp?45256
make cloudcare star usage configurable based on a domain setting
UI for enabling/disabling cloudcare starred releases for legacy domains
only show setting if domain has access to cloudcare
Merge pull request #3023 from dimagi/cloudcare-starred

cloudcare should use the latest starred build