k8s-infra-cherrypick-robot: [release-1.3] Fix apiserver cloud-provider arg for external cloud-provider template

JobBuild
2322
05-20 20:45
pull-cluster-api-provider-azure-apidiff-v1beta1 1527752424146604032
pull-cluster-api-provider-azure-apiversion-upgrade-v1beta1 1527791280602484736 1527752424037552128
pull-cluster-api-provider-azure-build-v1beta1 1527791280564736000 1527752423953666048
pull-cluster-api-provider-azure-ci-entrypoint-v1beta1 1527752424188547072
pull-cluster-api-provider-azure-e2e-optional-v1beta1 1527763576129851392
pull-cluster-api-provider-azure-e2e-v1beta1 1527770078106357760 1527752423999803392
pull-cluster-api-provider-azure-e2e-windows-dockershim-v1beta1 1527791280636039168 1527752424071106560
pull-cluster-api-provider-azure-test-v1beta1 1527791280526987264 1527752423915917312
pull-cluster-api-provider-azure-verify-v1beta1 1527791280673787904 1527752424113049600