Cannot dump foreign key constraints on partitioned table

Hi,

On the master head, getConstraints() function skips FK constraints for
a partitioned table because of tbinfo->hastriggers is false.

While creating FK constraints on the partitioned table, the FK triggers are only
created on leaf partitions and skipped for the partitioned tables.

To fix this, either bypass the aforementioned condition of getConstraints() or
set pg_class.relhastriggers to true for the partitioned table which doesn't seem
to be the right solution, IMO.  Thoughts?

Regards,
Amul