Calling this sets to false a variable used to track whether attributes have
been initialised.
It does this to get current status of the printer, whether accepting jobs etc.
But it triggers wholesale re-initialisation of everything, including if the prrinter supports color, the media available etc - in fact creating a new instance of CUPSPrinter every time if it is a CUPSPrinter.

This is way too much work and is responsible for the problems described in
JDK-7001133: OutOfMemoryError by CustomMediaSizeName implementation

A specific fix for that may still be merited, but I'd like to address the bigger problem too.