test(*): Revert unit test changes

Closes #7219

Author: rkaraivanov

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

@@ -455,15 +455,16 @@ describe('IgxGrid Master Detail #grid', () => {
             await wait(DEBOUNCETIME);
             fix.detectChanges();
 
-            const row = grid.getRowByIndex(2);
+            let row = grid.getRowByIndex(2);
             const targetCellElement = grid.getCellByColumn(2, 'ContactName');
             UIInteractions.simulateClickAndSelectEvent(targetCellElement);
             fix.detectChanges();
 
             UIInteractions.triggerEventHandlerKeyDown('ArrowUp', gridContent);
-            fix.detectChanges();
             await wait(DEBOUNCETIME);
+            fix.detectChanges();
 
+            row = grid.getRowByIndex(2);
             const detailRow = row.element.nativeElement.previousElementSibling as HTMLElement;
             GridFunctions.verifyMasterDetailRowFocused(detailRow);
             expect(GridFunctions.elementInGridView(grid, detailRow)).toBeTruthy();

projects/igniteui-angular/src/lib/grids/grid/grid.multi-row-layout.integration.spec.ts

@@ -606,7 +606,7 @@ describe('IgxGrid - multi-row-layout Integration #grid - ', () => {
             await wait(100);
             fixture.detectChanges();
 
-            const lastCell = grid.rowList.first.cells.toArray()[6];
+            const lastCell = grid.rowList.first.cells.toArray()[5];
             expect(lastCell.column.field).toBe('Address');
             expect(lastCell.column.parent.field).toBe('group4');
             expect(Math.round(lastCell.nativeElement.getBoundingClientRect().right) -