This is a task to revert the *.sql changes part of the PR https://github.com/kiegroup/jbpm/pull/1949/files.
 
The DB partition related features, delivered by BAPL-1926, are deactivated by default, so the schema change may not be relevant for most users, but may impact the ones trying to upgrade to 7.12.
 
If a customer would like to use the features related to BAPL-1926, they should update the schema adding the extra column "end_date" by themselves. 
 
The engine should not complain if the end_date is not present and the DB Partition related features are not activated.