Propose a way to ignore current unwanted TransitionAborted raised by Ember 2.X

addon/instance-initializers/new-relic.js

@@ -7,7 +7,17 @@ export function initialize() {
     return;
   }
 
+  function mustIgnoreError(error) {
+    // Ember 2.X seems to not catch `TransitionAborted` errors caused by regular redirects. We don't want these errors to show up in NewRelic so we have to filter them ourselfs.
+    // Once the issue https://github.com/emberjs/ember.js/issues/12505 is resolved we can remove this ignored error.
+    return (error.name === 'TransitionAborted');
+  }
+
   function handleError(error) {
+    if (mustIgnoreError(error)) {
+      return;
+    }
+
     try {
       NREUM.noticeError(error);
     } catch(e) {

tests/acceptance/new-relic-browser-test.js

@@ -10,7 +10,7 @@ test('Loading New Relic Browser', function(assert) {
   andThen(function() {
     var newRelic = window.NREUM;
 
-    assert.expect(6);
+    assert.expect(8);
 
     assert.ok(newRelic,
       'The New Relic object (NREUM) should be added to the window');
@@ -29,10 +29,16 @@ test('Loading New Relic Browser', function(assert) {
       assert.ok(error instanceof Error,
         'noticeError should receive an error object');
 
+      assert.ok(error.name !== 'TransitionAborted',
+        'noticeError should not be called by Ember.onerror on TransitionAborted errors.');
     };
 
     Ember.onerror(new Error('Awh crap'));
 
+    const transitionError = new Error('Ember Transition Aborted Test');
+    transitionError.name = "TransitionAborted";
+    Ember.onerror(transitionError);
+
     Ember.Logger.error('Whoops', 'We done messed up', {});
 
   });