[ADF- 4871][TaskHeaderCloudComponent] Add Candidate Users/Groups properties (#5189)

* [ADF-4871] [TaskHeaderCloudComponent] Add Candidate Users/Groups properties

* Added Candidate users/groups properties to the task heade cloud component.

* * Created CardViewArrayItemComponent
* Modified FullName pipe to return username or email incase fullname missing.
* Added candidate Users/Groups properties to the taskcloudheader component.
* Added two service into task-cloudservice
* Updated Demoshell card-view with new widget

* * Fixed failing unit test

* * Fixed comments.

* * Refactored CardViewArrayItem model
* Fixed comments.

* * Changed candidate group icon

lib/core/card-view/components/card-view-arrayitem/card-view-arrayitem.component.ts

@@ -0,0 +1,46 @@
+/*!
+ * @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 { Component, Input } from '@angular/core';
+import { CardViewArrayItemModel } from '../../models/card-view-arrayitem.model';
+import { CardViewUpdateService } from '../../services/card-view-update.service';
+
+@Component({
+  selector: 'adf-card-view-arrayitem',
+  templateUrl: './card-view-arrayitem.component.html',
+  styleUrls: ['./card-view-arrayitem.component.scss']
+})
+export class CardViewArrayItemComponent {
+
+    /** The CardViewArrayItemModel of data used to populate the cardView array items. */
+    @Input()
+    property: CardViewArrayItemModel;
+
+    constructor(private cardViewUpdateService: CardViewUpdateService) {}
+
+    clicked(): void {
+        this.cardViewUpdateService.clicked(this.property);
+    }
+
+    hasIcon(): boolean {
+        return !!this.property.icon;
+    }
+
+    displayCount(): number {
+        return this.property.noOfItemsToDisplay ? this.property.noOfItemsToDisplay : 0;
+    }
+}