[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/userinfo/services/identity-user.service.spec.ts

@@ -0,0 +1,60 @@
+/*!
+ * @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 { IdentityUserService } from '../services/identity-user.service';
+import { setupTestBed } from '../../testing/setupTestBed';
+import { CoreModule } from '../../core.module';
+import { mockToken } from './../../mock/jwt-helper.service.spec';
+
+describe('IdentityUserService', () => {
+
+    let service: IdentityUserService;
+
+    setupTestBed({
+        imports: [
+            CoreModule.forRoot()
+        ]
+    });
+
+    beforeEach(() => {
+        service = TestBed.get(IdentityUserService);
+    });
+
+    beforeEach(() => {
+        let store = {};
+
+        spyOn(localStorage, 'getItem').and.callFake( (key: string): String => {
+         return store[key] || null;
+        });
+        spyOn(localStorage, 'setItem').and.callFake((key: string, value: string): string =>  {
+          return store[key] = <string> value;
+        });
+    });
+
+    it('should able to fetch identity user info from Jwt token', (done) => {
+        localStorage.setItem('access_token', mockToken);
+        service.getCurrentUserInfo().subscribe(
+            (user) => {
+                expect(user).toBeDefined();
+                expect(user.firstName).toEqual('John');
+                expect(user.lastName).toEqual('Doe');
+                expect(user.email).toEqual('johnDoe@gmail.com');
+                done();
+            });
+    });
+});