Bug 17710 - C4::Matcher::get_matches and C4::ImportBatch::GetBestRecordMatch should...

Bug 17710 - C4::Matcher::get_matches and C4::ImportBatch::GetBestRecordMatch should use same logic

C4::ImportBatch::GetBestRecordMatch uses SQL to sort by score descending
then candidate_match_id descending. With C4::Matcher::get_matches, I
implement the same sort but use Perl code to do it, since we're sorting
search results.

It's a simple change, but it's in a big block of code, so I don't have
unit tests.

Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>