Fix the updating of `nextRenewOn`.
Fix the updating of `nextRenewOn`.

As per the way Doctrine checks for changes of `\DateTime` objects, it is required to `clone` the `nextRenewOn` date to change its reference ID.

See http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/cookbook/working-with-datetime.html for more details.

Aerendir/bundle-features,Aerendir/bundle-features,Aerendir/bundle-features