[CD16][Docs] Correct Hibernate Package Name in the Migration Guide

The Migration Guide Hibernate ORM section [1] references a package that does not exist. Specifically the following line:

"The SPIs in the org.hibernate.persister and com.hibernate.tuplizer packages have changed. Any custom classes using those SPIs will need to be reviewed and updated"

The `com.hibernate.tuplizer` package does not seem to exist. This should be `org.hibernate.tuple` as mentioned in the Hibernate GitHub documentation [2]

[1] https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.2/html-single/migration_guide/index#hibernate_orm_5_2_features
[2] https://github.com/hibernate/hibernate-orm/blob/5.2/migration-guide.adoc#persister-and-tuplizer-changes