* [24] don't request access to enclosing class if it's never used

Fixes after re-opening:
+ essentially revert previous change
+ replace with specific detection wrt local type alloc in static context

Fixes https://github.com/eclipse-jdt/eclipse.jdt.core/issues/3194

* [24] don't request access to enclosing class if it's never used

+ additional test

Fixes https://github.com/eclipse-jdt/eclipse.jdt.core/issues/3194