Forbidden class use does not work in field declarations and method declarations

[GoogleCodeExporter]

If you use a forbidden class (the whole class is forbidden, not a single 
method/field) in a field declaration or method declaration, this is not 
reported.
In most cases the error is still detected, because at some point the field has 
to be initialized or the method needs to be called, but we should detect this 
failure.
This is linked to issue #8, because the same code used here is also used to 
detect the annotations used.

Original issue reported on code.google.com by uwe.h.schindler on 15 Apr 2014 at 10:18