[AAE-8639] Discovery OpenId - Load discovery and pass info to jsapi (#7632)

* Load discovery and pass info to jsapi

* fix the roles empty scenario tests

* Make lint happier

* Rename the initApi method

* Add secret field

Co-authored-by: arditdomi <ardit.domi@hyland.com>

lib/core/services/openid-configuration.interface.ts

@@ -0,0 +1,26 @@
+/*!
+ * @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.
+ */
+
+export interface OpenidConfiguration {
+    authorization_endpoint: string;
+    token_endpoint: string;
+    userinfo_endpoint: string;
+    end_session_endpoint: string;
+    check_session_iframe: string;
+    revocation_endpoint: string;
+    introspection_endpoint: string;
+}