fix S3StoreTest.testList

Author: brokkoli71

src/test/java/dev/zarr/zarrjava/store/S3StoreTest.java

@@ -85,7 +85,7 @@ void testReadWriteS3Store() {
 
     @Override
     Store writableStore() {
-        return new S3Store(s3Client, bucketName, "");
+        return new S3Store(s3Client, bucketName, "writableStore");
     }
 
     @Override

src/test/java/dev/zarr/zarrjava/store/StoreTest.java

@@ -63,7 +63,6 @@ public void testListedItemsExist() throws IOException, ZarrException {
         Assertions.assertFalse(nodes.isEmpty()); // to ensure the sensitivity of this test
 
         nodes.forEach(keys -> {
-            System.out.println("Checking existence of key: " + String.join("/", keys));
             StoreHandle handle = store.resolve(keys);
             Assertions.assertTrue(handle.exists(), "Listed key does not exist: " + String.join("/", keys));
         });