Test data: avoid crazy transactions for expired patrons

Test data: avoid crazy transactions for expired patrons

Rather than creating brand new circ transactions for patrons who expired
in 1999, make things a little more realistic by filtering out the
patrons to those whose account expired in the past month or later, and
creating xact_start / due_date values based on their account expiry
date if expired, or NOW() if still active.

Oh, and add some patrons who expired over the past month. :)

Signed-off-by: Dan Scott <dscott@laurentian.ca>