Add '/version/' to the system:discovery role, since that's what the spec says.

[brendandburns]

See: kubernetes-client/java#153

Add the path '/version/' to the `system:discovery` cluster role.

[brendandburns]

Friendly ping to @liggitt I'd like to cherry-pick this into 1.9 once merged, since it is breaking clients.

[k8s-cherrypick-bot]

Removing label cherrypick-candidate because no release milestone was set. This is an invalid state and thus this PR is not being considered for cherry-pick to any release branch. Please add an appropriate release milestone and then re-add the label.

[k8s-cherrypick-bot]

Removing label cherrypick-candidate because no release milestone was set. This is an invalid state and thus this PR is not being considered for cherry-pick to any release branch. Please add an appropriate release milestone and then re-add the label.

[liggitt]

No objection, but do we actually answer subpaths?

[liggitt]

We should also fix the openapi spec to not put a trailing slash on the version endpoint url

[brendandburns]

@liggitt
It does work correctly, so we do answer at least '/version/'

[liggitt]

Let's just do /version/, then, and fix openapi ASAP

[brendandburns]

@liggitt switched to /version/

[liggitt]

/lgtm
/approve no-issue

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, liggitt

Associated issue requirement bypassed by: liggitt

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[brendandburns]

/retest

[k8s-github-robot]

Automatic merge from submit-queue (batch tested with PRs 57349, 57368). If you want to cherry-pick this change to another branch, please follow the instructions here.