Longhorn Manager v0.3-rc3

Update image

Manager to rancher/longhorn-manager:9838a5f
UI to rancher/longhorn-ui:99252cc

Longhorn Manager v0.3-rc2

Update images

Manager to: rancher/longhorn-manager:298b65f
Engine to: rancher/longhorn-engine:e58683a
UI to: rancher/longhorn-ui:829ebc8

Longhorn Manager v0.3-rc1

Update image to rancher/longhorn-manager:06a81b9