chore(*): Re-enable test.

Author: MKirova

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

@@ -211,7 +211,6 @@ describe('IgxHierarchicalGrid Basic Navigation #hGrid', () => {
     }));
 
     it('should include summary rows in tab sequence.', (async () => {
-        pending('Related to the issue #6701');
         const childGrid = hierarchicalGrid.hgridAPI.getChildGrids(false)[0];
         childGrid.getColumnByName('ID').hasSummary = true;
         fixture.detectChanges();