fix random test failing part 2 (#3395)

* fix random failing test core search/comment/auth/user

* fix node delete directive

* fix lint issues

* node restore fix

* fix comment test

* remove fdescribe

* fix tests and tslint

* fix upload test

* unsubscribe success event task test

* copy comment object during test

* use the data pipe performance improvement and standard usage

* uncomment random test

* fix comment date random failing test

* disposable unsubscribe

* fix start process

* remove fdescribe

* change start process test and remove commented code

* fix error event check double click

* clone object form test

* refactor date time test

* fix service mock

* fix test dropdown and context

* git hook lint

* fix language test

* unsubscribe documentlist event test

* fix disposable error

* fix console log service error document list

* unusbscribe search test

* clear input field

* remove wrong test

lib/process-services/task-list/components/task-details.component.spec.ts

@@ -267,7 +267,7 @@ describe('TaskDetailsComponent', () => {
         });
 
         it('should show placeholder message if there is no next task', () => {
-            getTasksSpy.and.returnValue(Observable.of(noDataMock));
+            getTasksSpy.and.returnValue(Observable.of([]));
             component.onComplete();
             fixture.detectChanges();
             expect(fixture.nativeElement.innerText).toBe('ADF_TASK_LIST.DETAILS.MESSAGES.NONE');