use dockerhub.akscn.io in mooncake (#3887)
use dockerhub.akscn.io in mooncake (#3887)


Azure/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,jackfrancis/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,Azure/acs-engine,jackfrancis/acs-engine