Skip KubeletCredentialProviders testing

Skip KubeletCredentialProviders testing

            containerStatuses:
            - image: gcr.io/k8s-authenticated-test/agnhost:2.6
              imageID: ""
              lastState: {}
              name: container-auth-image
              ready: false
              restartCount: 0
              started: false
              state:
                waiting:
                  message: Back-off pulling image "gcr.io/k8s-authenticated-test/agnhost:2.6"
                  reason: ImagePullBackOff

https://github.com/kubernetes/kubernetes/pull/117527

Change-Id: Ib4146488cfb945d360485944a8d864ec26905429
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>