De-dupe adding logic

Author: nicktindall

modules/repository-azure/src/main/java/org/elasticsearch/repositories/azure/AzureBlobStore.java

@@ -749,9 +749,7 @@ BlobStoreActionStats getEndpointStats() {
  }
 
  BlobStoreActionStats addTo(BlobStoreActionStats other) {
- final long ops = Math.addExact(operations.sum(), other.operations());
- final long reqs = Math.addExact(requests.sum(), +other.requests());
- return new BlobStoreActionStats(ops, reqs);
+ return new BlobStoreActionStats(operations.sum(), requests.sum()).add(other);
  }
  }