mod-oai-pmh customizations need to be migrated into poppy

[jeremythuff]

TAMU has customized Mod OAI-PMH so that exported records contain the 998 field. These customizations need to be moved into the Poppy Release of this module.

As best I can tell this is the release of the mod-oai-pmh that is included with poppy: 13.12.8 but this needs to be confirmed.

Here is an example of the the customizations ported for nolana. It will be useful to identify the source code for our current deployment of mod-oai-pmh.

To confirm that the work has been done successfully, the module will need to be built and deployed by operations on an environment that is running both Poppy and VUFind. Once deployed Ricky Lee and Trent Spears will need to confirm that the module is behaving as expected.