#10 Provide option: "Don't create logger field"

[Jürgen Kellerer]

There are situations where loggers must not use instance fields but instead one of the following cases happens:
- The class under the current scope derives from a logger (e.g. Servlets) (this should always be supported, regardless of the setup)
- The class under the current scope has a getter to retrieve the logger (this should always be supported, regardless of the setup).
- The logger must always be created by calling the factory method (local variables containing the logger must be reused).