Remove configuration.ws_streaming_protocol and use default headers to have the same effect

[mbohlool]

#298 and its dependencies added this config option. It is incompatible with swagger-codegen and prevent us from going back to generate configuration class. We should remove it and use default_headers of the api client for this purpose (with an example).

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/lifecycle stale

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/lifecycle rotten

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[k8s-ci-robot]

@fejta-bot: Closing this issue.

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Rotten issues close after 30d of inactivity.
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/close

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