#166146 - ruby debugging fails on V3 prelude B28D

#166146 - ruby debugging fails on V3 prelude B28D

Two problems: 
#1 - Regression in JRuby thread adoption of java native threads causing 
ruby breakpoints on request threads to hang the server.  GlassFish V3 
Prelude is  being patched and respun to work around this.   But that's 
not what this review email is for.
#2 - As of JRuby 1.2.0, stack frames in the ruby debugger are not shown 
when at a breakpoint.   We need to enable frame retention in JRuby.

Trivial fix in glassfish.jruby module - add "--debug" and 
"-Djruby.debug.fullTrace=true" options to JRuby command line when in 
debug mode.

http://hg.netbeans.org/cdev/rev/22bd82c54d6d

Thanks
-Peter