LU-11882 e2fsck: zero date is not inode badness

LU-11882 e2fsck: zero date is not inode badness

Lustre FS OST has some precreated objects which have zeroed
creation time. e2fsck adds badness points for such inodes.
If OST has many precreated objects, e2fsck spends too much time
during phase2, because processes each of such inode.

Let's allow Lustre FS inode has zeroed time field for
precreated objects.

Change-Id: I171a0fe741449ca99b29b5af51032a7b4c716344
Cray-bug-id: LUS-6857
Signed-off-by: Artem Blagodarenko <c17828@cray.com>
Reviewed-on: https://review.whamcloud.com/34113
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Li Dongyang <dongyangli@ddn.com>
Tested-by: Maloo <maloo@whamcloud.com>