use safer cipherSuites

[lance5890]

As the openshift-kube-scheduler-operator log shows it uses insecure cipher suites:

kubectl  logs -n openshift-kube-scheduler-operator openshift-kube-scheduler-operator-6bbcd855d5-5qxw4 

I0707 04:28:37.991198       1 cmd.go:241] Using service-serving-cert provided certificates
I0707 04:28:37.991323       1 leaderelection.go:122] The leader election gives 4 retries and allows for 30s of clock skew. The kube-apiserver downtime tolerance is 78s. Worst non-graceful lease acquisition is 2m43s. Worst graceful lease acquisition is {26s}.
I0707 04:28:37.991679       1 observer_polling.go:159] Starting file observer
I0707 04:28:38.783907       1 secure_serving.go:57] Forcing use of http/1.1 only
W0707 04:28:38.783934       1 secure_serving.go:69] Use of insecure cipher 'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256' detected.
W0707 04:28:38.783939       1 secure_serving.go:69] Use of insecure cipher 'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256' detected.
I0707 04:28:38.786999       1 leaderelection.go:250] attempting to acquire leader lease openshift-kube-scheduler-operator/openshift-cluster-kube-scheduler-operator-lock...
I0707 04:28:38.787258       1 requestheader_controller.go:169] Starting RequestHeaderAuthRequestController

maybe the ceo should run in secure cipher

[openshift-ci]

Hi @lance5890. Thanks for your PR.

I'm waiting for a openshift member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[openshift-ci]

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