NB 7.2 HR integration request: #213182 - NB runs out of memory during "Source->Inspect...->Netbeans Java Hints"

Description:
http://netbeans.org/bugzilla/show_bug.cgi?id=213182

Running Java Hints through Source/Inspect... processes files one by one 
when run on some project types, instead of processing the in bulk, 
leading to decreased performance, and unnecessary memory consumption.

Impact assessment: can slow down the inspection process so much that it 
is practically useless.

Risk assessment: low. The fix sorts the files not based on ClassPath 
identity, but on ClassPath content (except includes/excludes).

The fix has been reviewed by Tomas Zezula and verified by the reporter.

Changeset:
http://hg.netbeans.org/jet-main/rev/4bab8a67705d

Thanks for review,
    Jan