address comments - change Collection.ncopies to a for loop

Author: Shailesh Singh

server/src/main/java/org/opensearch/index/compositeindex/datacube/NumericDimension.java

@@ -77,5 +77,4 @@ public boolean equals(Object o) {
     public int hashCode() {
         return Objects.hash(field);
     }
-
 }

server/src/main/java/org/opensearch/index/compositeindex/datacube/startree/builder/BaseStarTreeBuilder.java

@@ -139,7 +139,9 @@ protected BaseStarTreeBuilder(
         int numDims = 0;
         for (Dimension dim : starTreeField.getDimensionsOrder()) {
             numDims += dim.getNumSubDimensions();
-            dimensionComparators.addAll(Collections.nCopies(dim.getNumSubDimensions(), dim.comparator()));
+            for (int i = 0; i < dim.getNumSubDimensions(); i++) {
+                dimensionComparators.add(dim.comparator());
+            }
             dimensionsSplitOrder.add(dim);
         }
         this.numDimensions = numDims;