Fix error in metadata

BalletsRusses.xml had the following:
<item_-_MODS_-_PublicationDate>Berlin</item_-_MODS_-_PublicationDate>
Obviously, this is wrong. After some quick research on the web, it
was confirmed that the publisher ("Verl. Herm. Leiser") is located
in Berlin, so the erroneous information was moved to
<item_-_MODS_-_PublicationPlace>
Regenerate MODS due to error fix in remediated data