Remove processed state at the end.

Author: MKirova

projects/igniteui-angular/src/lib/data-operations/pivot-strategy.ts

@@ -121,7 +121,6 @@ export class PivotColumnDimensionsStrategy implements IPivotDimensionStrategy {
                         delete hierarchy[k];
                     }
                 });
-                delete hierarchy.processed;
                 for (const property in flatCols) {
                     if (flatCols.hasOwnProperty(property)) {
                         hierarchy[property] = flatCols[property];

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

@@ -77,6 +77,7 @@ export class IgxPivotRowExpansionPipe implements PipeTransform {
     private cleanState(data, pivotKeys) {
         data.forEach(rec => {
             const keys = Object.keys(rec);
+            delete rec.processed;
             //remove all record keys from final data since we don't need them anymore.
             keys.forEach(k => {
                 if (k.indexOf(pivotKeys.records) !== -1) {