certain require do not load extension Service class

[mkristian]

$ bin/jruby -e "require 'uri:classloader:/lib/ruby/shared/json/ext/parser'; p JSON::Ext::Parser"

fails. same with the file:, jar:, file:jar: protocol. the *uri:jar:file:my.jar!/" protocol does not even look into the right place place to load the Service class from the gem extension.

[mkristian]

I was wrong about the *uri:file: protocol and the wrong place. is part of the test now. closing.

[mkristian]

on master this is already fixed with 764d6af

@headius either I revert this patch and backport master to jruby-1_7 or do the other way around. please also have a look at #2987

in any case I would cherry-pick the tests added with 62fa282