Update IndicesRequestCacheIT.java

Signed-off-by: Kiran Prakash <awskiran@amazon.com>

Author: kiranprakash154

server/src/internalClusterTest/java/org/opensearch/indices/IndicesRequestCacheIT.java

@@ -65,6 +65,8 @@
 import java.util.Collection;
 import java.util.List;
 
+import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_REPLICAS;
+import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_SHARDS;
 import static org.opensearch.indices.IndicesRequestCache.INDICES_REQUEST_CACHE_STALENESS_THRESHOLD_SETTING;
 import static org.opensearch.search.SearchService.CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING;
 import static org.opensearch.search.aggregations.AggregationBuilders.dateHistogram;
@@ -104,7 +106,12 @@ public void testCacheAggs() throws Exception {
                 .indices()
                 .prepareCreate("index")
                 .setMapping("f", "type=date")
-                .setSettings(Settings.builder().put(IndicesRequestCache.INDEX_CACHE_REQUEST_ENABLED_SETTING.getKey(), true))
+                .setSettings(
+                    Settings.builder()
+                        .put(IndicesRequestCache.INDEX_CACHE_REQUEST_ENABLED_SETTING.getKey(), true)
+                        .put(SETTING_NUMBER_OF_SHARDS, 1)
+                        .put(SETTING_NUMBER_OF_REPLICAS, 0)
+                )
                 .get()
         );
         indexRandom(