Replace the hidden key aspect of the new interface with a more general
fillIdentityColumn() method.
Bump the Metadata version for both Persisit and FDB as the hidden PK
changes are enough to cause failures with old version of the data.
Move the full text index test to it's own IT to stop interfereing with
the identity test.
Rename the AKIBAN_PK column to ROW_ID/__row_id for a more neutral term
of use. Update referenced files and tests.