Minikube ISO name does not show in the iso-url usage

[LalatenduMohanty]

Currently on b2d and CentOS is shown in the usage and the documentation does not have information about minikube ISO [1].

$ minishift start --help | grep iso-url
      --iso-url string                  Location of the minishift ISO. Can be an URL, file URI or one of the following short names: [b2d centos]. (default "b2d")

[1] https://docs.openshift.org/latest/minishift/using/managing-minishift.html#choosing-iso-image

[gbraad]

At the moment I think this is done on purpose... however, I think some of this also needs to be behind a feature toggle. We do not have a real 'location' to download the image from with our changes. I suggest to track the progress in a general task (verify feature parity: hostfolders, ip assignment, etc) and based on this decide if we can make this option available.

[LalatenduMohanty]

@gbraad I understand your concerns but unless we do not expose the minikube ISO name in the usage I do not it will get any proper testing. I would suggest that we expose the short name and mention in the documentation [1] that the ISO is newly added to Minishift and should be considered experimental.
@minishift/minishift-dev comments?

[1] https://docs.openshift.org/latest/minishift/using/managing-minishift.html#choosing-iso-image

P:S: I have updated the original description about missing documentation.

[gbraad]

But when EnableExperimental is enabled I would say, as we have not performed any rigorous testing by ourselves.

[coolbrg]

Resolved via #1514