Bug 24379: Fix failing tests

Bug 24379: Fix failing tests

kohadev-koha@kohadevbox:/kohadevbox/koha$ prove t/db_dependent/Koha/Patrons/Import.t
t/db_dependent/Koha/Patrons/Import.t .. 2/159
 #   Failed test 'No warning raised by import_patrons'
 #   at t/db_dependent/Koha/Patrons/Import.t line 171.
 # found warning: Argument "" isn't numeric in numeric eq (==) at /usr/share/perl5/DBIx/Class/Row.pm line 1018, <$handle_3a> line 2.
 # found warning: Argument "" isn't numeric in numeric eq (==) at /usr/share/perl5/DBIx/Class/Row.pm line 1018, <$handle_3a> line 2.
 # didn't expect to find a warning
Argument "" isn't numeric in numeric eq (==) at /usr/share/perl5/DBIx/Class/Row.pm line 1018, <$handle_2> line 2.
Argument "" isn't numeric in numeric eq (==) at /usr/share/perl5/DBIx/Class/Row.pm line 1018, <$handle_2> line 2.
Argument "" isn't numeric in numeric eq (==) at /usr/share/perl5/DBIx/Class/Row.pm line 1018, <$handle_3> line 2.
Argument "" isn't numeric in numeric eq (==) at /usr/share/perl5/DBIx/Class/Row.pm line 1018, <$handle_3> line 2.
Argument "" isn't numeric in numeric eq (==) at /usr/share/perl5/DBIx/Class/Row.pm line 1018, <$handle_4> line 2.
Argument "" isn't numeric in numeric eq (==) at /usr/share/perl5/DBIx/Class/Row.pm line 1018, <$handle_4> line 2.
t/db_dependent/Koha/Patrons/Import.t .. 152/159 # Looks like you failed 1 test of 159.
t/db_dependent/Koha/Patrons/Import.t .. Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/159 subtests

Test Summary Report
-------------------
t/db_dependent/Koha/Patrons/Import.t (Wstat: 256 Tests: 159 Failed: 1)
  Failed test:  39
  Non-zero exit status: 1
Files=1, Tests=159,  3 wallclock secs ( 0.04 usr  0.01 sys +  2.11 cusr  0.24 csys =  2.40 CPU)
Result: FAIL

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>