Fix implementation of explicit refresh policy.

Original Pull Request #2908
Closes #2907

Author: sothawo

src/main/java/org/springframework/data/elasticsearch/repository/support/SimpleElasticsearchRepository.java

@@ -457,9 +457,7 @@ public <R> R executeAndRefresh(OperationsCallback<R> callback) {
 
 	@Nullable
 	public <R> R executeAndRefresh(OperationsCallback<R> callback, @Nullable RefreshPolicy refreshPolicy) {
-		R result = callback.doWithOperations(operations.withRefreshPolicy(refreshPolicy));
-		doRefresh();
-		return result;
+        return callback.doWithOperations(operations.withRefreshPolicy(refreshPolicy));
 	}
 	// endregion
 }