Add close() to scan call

Author: KodaiD

integration-test/src/main/java/com/scalar/db/api/DistributedStoragePermissionIntegrationTestBase.java

@@ -99,15 +99,15 @@ public void scan_WithSufficientPermission_ShouldSucceed() {
             .partitionKey(Key.ofInt(COL_NAME1, PARTITION_KEY_VALUE))
             .build();
     // Act Assert
-    assertThatCode(() -> storageForNormalUser.scan(scan)).doesNotThrowAnyException();
+    assertThatCode(() -> storageForNormalUser.scan(scan).close()).doesNotThrowAnyException();
   }
 
   @Test
   public void scanAll_WithSufficientPermission_ShouldSucceed() {
     // Arrange
     Scan scan = Scan.newBuilder().namespace(namespace).table(TABLE).all().build();
     // Act Assert
-    assertThatCode(() -> storageForNormalUser.scan(scan)).doesNotThrowAnyException();
+    assertThatCode(() -> storageForNormalUser.scan(scan).close()).doesNotThrowAnyException();
   }
 
   @Test