fix(instrumentation): fix version checking

Author: Shadowbeetle

lib/instrumentations/index.js

@@ -79,7 +79,7 @@ function instrumentModule (target, instrumentation, agent, load) {
   var pkg
   if (target.package) {
     try {
-      pkg = Module._load.call(this, path.join(target.name, 'package.json'), this)
+      pkg = Module._load.call(this, path.join(target.name, 'package.json'), loadArguments[1])
     } catch (err) {
       debug('#instrumentModule', format('[Warning] cannot load `[%s] package.json`, ' +
       'although it was requested by the instrumentation group. Instrumentation might not work properly. ' +