jbd2: round commit timer up to avoid uncommitted transaction

jbd2: round commit timer up to avoid uncommitted transaction

(cherry picked from commit b1f485f20eb9b02cc7d2009556287f3939d480cc)

fix jiffie rounding in jbd commit timer setup code.  Rounding down
could cause the timer to be fired before the corresponding transaction
has expired.  That transaction can stay not committed forever if no
new transaction is created or expicit sync/umount happens.

Signed-off-by: Alex Zhuravlev (Tomas) <alex.zhuravlev@sun.com>
Signed-off-by: Andreas Dilger <adilger@sun.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>