[auth] Added display of oauth2

src/main/template/oauth2.handlebars

@@ -0,0 +1,21 @@
+<p>{{description}}</p>
+<p>Select OAuth2.0 Scopes</p>
+<p>Scopes are used to grant an application different levels of access to data on behalf of the end user. Each API may declare one or more scopes.
+    <a href="#">Learn how to use</a>
+</p>
+<p><strong> {{appName}} </strong> API requires the following scopes. Select which ones you want to grant to Swagger UI.</p>
+<p>Authorization URL: {{authorizationUrl}}</p>
+<p>flow: {{flow}}</p>
+<ul class="api-popup-scopes">
+    {{#each scopes}}
+        <li>
+            <input class="oauth-scope" type="checkbox" scope="{{scope}}" oauthtype="{{OAuthSchemeKey}}"/>
+            <label>{{scope}}</label><br/>
+            <span class="api-scope-desc">{{description}}
+                {{#if OAuthSchemeKey}}
+                    ({{OAuthSchemeKey}})
+                {{/if}}
+            </span>
+        </li>
+    {{/each}}
+</ul>