Bug 13673: Fix whitespace issues

Bug 13673: Fix whitespace issues

Indentation was horrible. Fixed to meet 4 space standard.

TEST PLAN
---------
1) Notice tabs in t/db_dependent/Barcodes.t
2) $ prove t/db_dependent/Barcodes.t
3) apply patch
4) $ prove t/db_dependent/Barcodes.t
   -- same output as before.
5) $ git diff -w origin/master
   -- code is identical except for indentations.
6) koha qa test tools

Signed-off-by: Indranil Das Gupta <indradg@gmail.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>