Committing a transaction creating a file required insuring that the
inode stayed in cache until the journal was written to.  i_count was
being incremented until the transaction was complete.

However, incrementing i_count caused fcntl(S_SETLEASE) to fail.  I
reworked the transaction code so that the inode does not have to
stay in-memory while the transaction is being committed.

Thanks to Steve French for figuring out why setlease was failing.