Nullify a reference to the original XML otml DOM Document, as that tends to bloat memory and isn't used after the database is loaded.
Nullify a reference to the original XML otml DOM Document, as that tends to bloat memory and isn't used after the database is loaded.

git-svn-id: 8ebed0c25533aaea68ca43268d4d516467f97e6a@22154 6e01202a-0783-4428-890a-84243c50cc2b

concord-consortium/otrunk,concord-consortium/otrunk