https://review.openstack.org/348943 introduced a test that fails
to run in SQLite 3.7.17, because the failed constraint message in
that version differs from the one expected: "CHECK constraint failed"
is expected, but "(sqlite3.IntegrityError) constraint failed" is
received.
Fixing this by setting the regexp to an error message that matches
in both versions.
Change-Id: I4b09eb4c3804fb9279a5acb3c1409def739e28c3