LP#1670407 Add tests for xact_finish close/re-open
Since this bug came about due to negative balance changes (and it was
easier), this commit extends the existing negative balances test suite
to include basic tests for checking both xact_finish conditions.
One of these tests fails without the fix from the previous commit.
Avoid re-closing a circulation that was re-opened during checkin because
it acquired a non-zero balance. This is typically caused by, for
example, voiding a lost item fee during checkin and/or generating
overdues for lost-then-found items.
Signed-off-by: Bill Erickson <email address hidden>
Signed-off-by: Dan Wells <email address hidden>
