Make operation_name configurable

[el-stano]

Hello, could we make operation_name configurable?

[mpetazzoni]

I'm not sure this would help much, as most code rarely uses Session.request() directly; it is instead called by other methods like .get(...) or .post(...).

[el-stano]

I thought one could still use e.g. session.post(some_url, data=some_data, operation_name="entity.create") -- since .get(...) and .post(...) essentially hand their kwargs over to .request(...)?

https://github.com/psf/requests/blob/master/requests/sessions.py#L590