Bug 13938 - Staging MARC records for import fails

Bug 13938 - Staging MARC records for import fails

It appears that bug 8970 has introduced a bug where a MARC file uploaded
for staging fails to import *unless* a matching rule is selected.

Test Plan:
1) Apply this patch
2) Stage and import a MARC record *without* choosing a matching rule
3) Note the staging works as expected

Signed-off-by: Cindy Ames <cmurdock@ccfls.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>