Bug 37550: Move item check after error handling

Bug 37550: Move item check after error handling

To test:
1 - Grab the sample file on this bug report
2 - perl misc/migration_tools/bulkmarcimport.pl -b --file=spaceditems.pl -v
3 - An exception for 'Duplicate ID' is thrown and script dies
4 - Apply patch
5 - run script again
6 - The script finishes, no items are added, but record is

Signed-off-by: Phil Ringnalda <phil@chetcolibrary.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>