Change name to metadata

Author: thoov

src/ember-app.js

@@ -202,7 +202,7 @@ class EmberApp {
     let fastbootInfo = new FastBootInfo(
       req,
       res,
-      { hostWhitelist: this.hostWhitelist, metaData: options.metaData }
+      { hostWhitelist: this.hostWhitelist, metadata: options.metadata }
     );
     let doc = bootOptions.document;
 

src/fastboot-info.js

@@ -8,15 +8,15 @@ var FastBootResponse = require('./fastboot-response');
  * on to the FastBoot service.
  */
 function FastBootInfo(request, response, options = {}) {
-  const { hostWhitelist, metaData } = options;
+  const { hostWhitelist, metadata } = options;
 
   this.deferredPromise = RSVP.resolve();
   if (request) {
     this.request = new FastBootRequest(request, hostWhitelist);
   }
 
   this.response = new FastBootResponse(response || {});
-  this.metaData = metaData;
+  this.metadata = metadata;
 }
 
 FastBootInfo.prototype.deferRendering = function(promise) {