Bug 9295: Introduce operator equal/ notequal to OAI set mapping instead of hardcoded...

Bug 9295: Introduce operator equal/ notequal to OAI set mapping instead of hardcoded 'equal' value.

In OAI set mappings, the value "is equal to" is hardcoded. This
enhancement changes it to a dropdown menu to choose between "is equal
to" and "not equal to".

To test:

* define a set
* define a mapping for said set with "is equal to"
* run /misc/migration_tools/build_oai_sets.pl -r -v
* confirm that you have correct entries in SQL: select * from
  oai_sets_biblios;
* change mapping to 'not equal to', save
* run /misc/migration_tools/build_oai_sets.pl -r -v
* confirm that you have correct entries in SQL: select * from
  oai_sets_biblios;

Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Amended patch: Fix bug id in updatedb.pl

Signed-off-by: Galen Charlton <gmc@esilibrary.com>