test invalid lock resolution with 'throws_ok'

The handle has RaiseError=>1 and throws. Not sure why it worked with
DBI 1.628, but with 1.630 it dies.

Working (1.628): https://buildd.debian.org/status/fetch.php?pkg=libdbd-firebird-perl&arch=ia64&ver=1.15-2&stamp=1378808203

Not working (1.630): http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=729680
Release DBD-Firebird 1.16