creating Configuration disables all HTTP debug logging

Debug mode is disabled automatically in the constructor.
https://github.com/kubernetes-client/python/blob/6b01c95e1673c0787d3d688b361bfd995d62dd98/kubernetes/client/configuration.py#L126

Doing so disables HTTP debug logging for the whole application.
https://github.com/kubernetes-client/python/blob/6b01c95e1673c0787d3d688b361bfd995d62dd98/kubernetes/client/configuration.py#L265-L270

This means that even HTTP requests that have nothing to do with k8s won't be logged anymore. This is neither expected or desirable. Enabling/disabling debug logging should not tamper with the global `HTTPConnection.debuglevel` setting in any way.

Furthermore, it looks like two separate `Configuration`s will still share their loggers. Consequently, you cannot really have one that has debug disabled and another with debug enabled. Thus it shouldn't be presented as an instance field.