[TYPO3-core] RFC #9657: Instantiate time tracker as null object if not really required

[Rupert Germann]

Steffen Gebert schrieb:
> 
>> * @author    Ingo Renner <ingo at typo3.org>
> Are you the author of the null-class or Ingo?

Ingo.
He made the inital patch, I improved it a bit.

greets
rupert