LU-14912 obdclass: prefer T10 checksum if the target supports it

LU-14912 obdclass: prefer T10 checksum if the target supports it

If the target actually has T10PI support, we prefer to use that
T10 checksum even it's not the fastest on the client, given
checksum_type is not explicitly set.

Lustre-change: https://review.whamcloud.com/44657
Lustre-commit: 5e9059e08aec6fb36de6788465978de0e962b956

Change-Id: If91217881fcadbc84d1e360e65648344f5ac2447
Test-Parameters: trivial
Signed-off-by: Li Dongyang <dongyangli@ddn.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Li Xi <lixi@ddn.com>
Reviewed-on: https://review.whamcloud.com/46927
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>