XWIKI-19207: Increase the limit of the parent size to the maximum supported by MySQL

(cherry picked from commit 218c1af3)

xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/store/migration/hibernate/R130407000XWIKI19207DataMigration.java

@@ -31,6 +31,8 @@
  *
  * @version $Id$
  * @since 13.4.7
+ * @since 13.10.2
+ * @since 14.0RC1
  */
 @Component
 @Named("R130407000XWIKI19207")