Configure cipher-suites in etcd daemon

Solution Verified - Updated -

Issue

By default, etcd supports weak cipher suites.

Environment

Every etcd >= 3.2.22
OpenShift <= 3.9 (OpenShift 3.10 includes support by default through a different mechanism)
RPM environment (the provided steps do not work with containerized environments)

CHANGELOG: https://github.com/coreos/etcd/blob/master/CHANGELOG-3.2.md#v3222-2018-06-06

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