[ACA-3416] Add Claim/Release actions on adf task form (#5753)

* [ACA-3255] FE - Claim a task

* * Added unit tests

* * Added unit tests
* Changed cloud directive names

* * Added/Updated documents

* * Added showReleaseClaim button flag
* Add unit test too

* * Used claim/release directive in task-header component.

* * Fixed unit test

* * Fixed one comment

* * After rebase

* * Fixed comments

docs/process-services/components/form-custom-outcome.component.md

@@ -0,0 +1,34 @@
+---
+Title: Form custom outcomes component
+Added: v3.9.0
+Status: Active
+Last reviewed: 2020-06-09
+---
+
+# [Form custom outcomes component](../../../lib/process-services/src/lib/form/form-custom-outcomes.component.ts "Defined in form-custom-outcomes.component.ts")
+
+Supplies custom outcome buttons to be included in [Form component](form.component.md).
+
+![](../../docassets/images/form-custom-outcomes.component.png)
+
+## Basic Usage
+
+```html
+<adf-form>
+    <adf-form-custom-outcomes>
+        <button mat-button (click)="onCustomOutcome1()">
+            Custom-outcome-1
+        </button>
+        <button mat-button (click)="onCustomOutcome2()">
+            Custom-outcome-2
+        </button>
+        <button mat-button (click)="onCustomOutcome3()">
+            Custom-outcome-3
+        </button>
+    </adf-form-custom-outcomes>
+</adf-form>
+```
+
+## See Also
+
+-   [Form component](form.component.md)