[ADF-4125] simplify extension load in extension module (#4214)

* add extension load in extension module

* add viewer extensions

* fix license header

* fix node passed in the viewer extension

* fix node passed in the viewer extension

* startup factory extension

* startup factory extension

* fix script

* fix beta tag build

* fix build

* fix build

* refactoring configuration files

* extension using map

* fix build

* fix config

* fix test

* fix test

demo-shell/src/app/app-extension.module.ts

@@ -0,0 +1,27 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { NgModule } from '@angular/core';
+import { AcaMonacoModule } from 'adf-monaco-extension';
+
+@NgModule({
+    imports: [
+        AcaMonacoModule
+    ]
+})
+export class AppExtensionsModule {
+}