SchemaTool has custom logic for creating the primary key of a
joined-table inherited entity. This logic overlooked association maps
as a possible source for identity columns, resulting in a fatal error
when fetching the primary key list for child entities.
Removed any custom logic for generating primary keys for root entities
in joined-table inheritance, deferring to the common logic used for
other entities.
Also adjusted the child entity logic, scanning association maps for
identity columns, and including the column as appropriate. It also
ensures that the primary key columns are in the correct order.
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