It turns out that you have to rely on the cascading delete of the table
objects after removing all the relationship columns and relationships
owned by a schema.  Otherwise you're not relying on the deletion of the
tables in the correct order, and the clearing of the Table.PIndex doesn't happen
in the correct sequence.

Gonna be a long wait for this manufacturing run -- all the Java layers
need to be regen'd to allow for all the Tenant relationships that were
removed.