Need reviewer - jdk7 jdwpgen, added netbeans project, fixed findbugs errors

[Kelly O'Hair]

Kelly O'Hair wrote:
> 
> Still need reviewer ...
> 
>   6853636: Fix warnings in jdwpgen, add jdwpgen NetBeans project
> 
>   
> http://cr.openjdk.java.net/~ohair/openjdk7/jdk7-build-jdwpgen-6853636/webrev/ 
> 
> 
> Pretty harmless code cleanup on the tool used to generate
> some of the JDWP code for the debugger.

The webrev has been updated.

The field constantMap is now final.

The throw in Main.java usage() is gone and use of usage() is now followed by
a simple return from main().

Thanks for the reviews from Andrew, Alan, and Tim.

Let me know if this looks ok now.

-kto