LP#1402905 Use stricter matching for UPC values

Per http://www.loc.gov/marc/bibliographic/bd024.html we
should be checking to see if either the ind1 is "1" or
if there's a subfield 2 with a value of "upc" before
assuming that any "Other standard identifier" 024 field
is a UPC value.

Signed-off-by: Dan Scott <dscott@laurentian.ca>
Signed-off-by: Ben Shum <bshum@biblio.org>