Bug 8620 - Barcode searching not working correctly

This patch adds barcode back into the any index in the relevant config
files for dom indexing.

To test: Before patch try seraching a for a barcode from the keyword search in
either opac or staff interfaces (like scanning a barcode into the 'search the
catalogue' in the staff client). You'll likely get no results.

After the patch, doing the same search should bring up the specific book your
looking for.