chore(*): fix failing unit test

Author: viktorkombov

projects/igniteui-angular/src/lib/grids/hierarchical-grid/hierarchical-grid-api.service.ts

@@ -132,7 +132,7 @@ export class IgxHierarchicalGridAPIService extends GridBaseAPIService<GridType>
         if (rootGrid.gridAPI.crudService.cellInEditMode) {
             rootGrid.gridAPI.crudService.endEdit();
         }
-        rootGrid.getChildGrids(true).forEach(g => {
+        rootGrid.hgridAPI.getChildGrids(true).forEach(g => {
             if (g.gridAPI.crudService.cellInEditMode) {
                 g.gridAPI.crudService.endEdit();
             }

projects/igniteui-angular/src/lib/grids/hierarchical-grid/hierarchical-grid.spec.ts

@@ -500,7 +500,7 @@ describe('Basic IgxHierarchicalGrid #hGrid', () => {
 
         expect(childGridSecondCell.editMode).toBeTruthy();
 
-        UIInteractions.simulateClickAndSelectEvent(masterGridFirstRow.expander);
+        UIInteractions.simulateClickAndSelectEvent(childGridSecondRow.expander);
         fixture.detectChanges();
         wait();
 

projects/igniteui-angular/src/lib/grids/hierarchical-grid/hierarchical-row.component.ts

@@ -149,6 +149,6 @@ export class IgxHierarchicalRowComponent extends IgxRowDirective {
 
     // TODO: consider moving into CRUD
     protected endEdit(grid: GridType) {
-        grid.gridAPI.endEditAll();
+        grid.hgridAPI.endEditAll();
     }
 }