refactor: Update 'core' app references to 'admin'

ui/admin/tests/index.html

@@ -3,7 +3,7 @@
   <head>
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <title>Core Tests</title>
+    <title>Admin Tests</title>
     <meta name="description" content="">
     <meta name="viewport" content="width=device-width, initial-scale=1">
 
@@ -11,7 +11,7 @@
     {{content-for "test-head"}}
 
     <link rel="stylesheet" href="{{rootURL}}assets/vendor.css">
-    <link rel="stylesheet" href="{{rootURL}}assets/core.css">
+    <link rel="stylesheet" href="{{rootURL}}assets/admin.css">
     <link rel="stylesheet" href="{{rootURL}}assets/test-support.css">
 
     {{content-for "head-footer"}}
@@ -24,7 +24,7 @@
     <script src="/testem.js" integrity=""></script>
     <script src="{{rootURL}}assets/vendor.js"></script>
     <script src="{{rootURL}}assets/test-support.js"></script>
-    <script src="{{rootURL}}assets/core.js"></script>
+    <script src="{{rootURL}}assets/admin.js"></script>
     <script src="{{rootURL}}assets/tests.js"></script>
 
     {{content-for "body-footer"}}

ui/admin/tests/test-helper.js

@@ -1,5 +1,5 @@
-import Application from 'core/app';
-import config from 'core/config/environment';
+import Application from '../app';
+import config from '../config/environment';
 import { setApplication } from '@ember/test-helpers';
 //import { start } from 'ember-qunit';
 import start from 'ember-exam/test-support/start';