[ADF-3666] User Profile - Provide a way to show SSO Logged-In User (#3976)

* * Created IdentityUserService
* Created IdentityUserModel
* Added JWT lib into package.json

* * Provided a way to show SSO user info

* * Added  condition to check sso login

* * Refactored userInfo component* Updated unit tests to the recent changes

* * Created IdenityUser model
* Refactored userInfoComponent

* * Modified userInfoComponent
* Modified unit tests

* * Used Fullname pipe* Removed the logic that we had to display fullname in the ecm/bpm/identity model* Created JwtHelperService* Modified ecm/bpm services * added test cases to the identity service

* * Moved jwt service to core/service

* * Updated userInfo doc

* * Added missing return types

* * Created a mockToken* Added unit tests to the JwtHelperService* Updated identityUserService unit test

* Update jwt-helper.service.spec.ts

* * Updated bpm/ecm/identity services

lib/core/services/jwt-helper.service.spec.ts

@@ -0,0 +1,45 @@
+/*!
+ * @license
+ * Copyright 2016 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 { TestBed } from '@angular/core/testing';
+import { JwtHelperService } from './jwt-helper.service';
+import { mockToken } from './../mock/jwt-helper.service.spec';
+
+describe('JwtHelperService', () => {
+
+    let jwtHelperService: JwtHelperService;
+
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [JwtHelperService]
+        });
+        jwtHelperService = TestBed.get(JwtHelperService);
+    });
+
+    it('should be able to create the service', () => {
+        expect(jwtHelperService).not.toBeNull();
+        expect(jwtHelperService).toBeDefined();
+    });
+
+    it('Should decode the Jwt token', () => {
+        const result = jwtHelperService.decodeToken(mockToken);
+        expect(result).toBeDefined();
+        expect(result).not.toBeNull('');
+        expect(result['given_name']).toBe('John Doe');
+        expect(result['email']).toBe('johnDoe@gmail.com');
+    });
+});