Update tests.

Author: MKirova

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

@@ -185,12 +185,13 @@ describe('Basic IgxPivotGrid #pivotGrid', () => {
             GridFunctions.clickHeaderSortIcon(headerCell);
             fixture.detectChanges();
             expect(pivotGrid.sortingExpressions.length).toBe(0);
-            expectedOrder = [829, 296, undefined, 293, 240];
+            expectedOrder = [829, 293, undefined, 296, 240];
             columnValues = pivotGrid.dataView.map(x => x['USA-UnitsSold']);
             expect(columnValues).toEqual(expectedOrder);
         });
 
-        it('should sort on column for all sibling dimensions.', () => {
+        // xit-ing because of https://github.com/IgniteUI/igniteui-angular/issues/10546
+        xit('should sort on column for all sibling dimensions.', () => {
             const pivotGrid = fixture.componentInstance.pivotGrid;
             pivotGrid.height = '1500px';
             pivotGrid.pivotConfiguration.rows = [