fix haraka requires

index.js

@@ -1,12 +1,12 @@
 let fs = require('fs');
 
 let bodyParser = require('body-parser');
-let outbound = require('./outbound');
-
-let getTemplates = require('./templates');
-let errorSender = require('./errorSender');
+let outbound, getTemplates, errorSender;
 
 exports.register = function() {
+  outbound = this.haraka_require('./outbound');
+  getTemplates = this.haraka_require('./templates');
+  errorSender = this.haraka_require('./errorSender');
   this.register_hook('hook_init_http', function(next, server) {
     server.http.app.use('/webSend', setupRoutes(server.http.express.Router()));
     next();