createDTraceProvider use exported binding

You can replace the exported mechanism to allow for wrapping, but still use the factory method

Author: New Product Development Post Launch Control Room

dtrace-provider.js

@@ -35,6 +35,6 @@ if (!DTraceProvider) {
 exports.DTraceProvider = DTraceProvider;
 exports.createDTraceProvider = function(name, module) {
  if (arguments.length == 2)
- return (new DTraceProvider(name, module));
- return (new DTraceProvider(name));
+ return (new exports.DTraceProvider(name, module));
+ return (new exports.DTraceProvider(name));
 };