Fix newline issue of priorityClassName when enable ingress_nginx_tolerations

[peerapach]

Fix newline issue of priorityClassName when enable ingress_nginx_tolerations.

This is the problem of ds-ingress-nginx-controller.yml file.

...
      tolerations:
        - effect: NoSchedule
          key: key
          operator: Equal
          value: value      priorityClassName: k8s-cluster-critical
      containers:
        - name: ingress-nginx-controller
...

[chadswen]

/approve
/lgtm
ci check this

[k8s-ci-robot]

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This pull-request has been approved by: chadswen, peerapach

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