This uses the established abstractions to implement the usual
subcommands for the ImageUpdateAutomation type.
I've called the sub-subcommand in each case `image-update`, as a
fairly safe shorthand for the much longer `image-update-automation`.
Signed-off-by: Michael Bridgen <michael@weave.works>
This adds all the standard subcommands for the ImageRepository type.
Following `source`, I have put them under a namespace: `auto`,
referring to automation.
NB For `create` I use controllerutil.CreateOrUpdate, which looks to me
like a slightly more rounded version of the upsert* funcs.
Signed-off-by: Michael Bridgen <michael@weave.works>
