Bug 24531: Test for OAI-PMH sets and repeated fields

Bug 24531: Test for OAI-PMH sets and repeated fields

This patch adds two tests related to OAI-PMH sets. It creates a
dummy record with a repeated field, with different values. It then
tests if the record is caught by mappings that match the value in
the first field, and then if it is caught by mappings that match
the second field.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>