r14763: Add a new tuning parameter, open files database hash size,

r14763: Add a new tuning parameter, open files database hash size,
this allows us to experiment with ensuring the tdb hash
size for our open files and locking db are appropriately
sized. Make the hash size larger by default (10007 instead
of 1049) and make the locking db hash size the same as the
open file db hash size.
Jeremy.
(This used to be commit e7225f7e813423c3e2a94af6a9d7ce8a1b50a166)