LU-16518 misc: use fixed hash code

LU-16518 misc: use fixed hash code

There is a configure check to avoid using
broken hashing code. All calls to 'hash_*'
are replace by the 'cfs_hash_*' equivalents,
to make use of this check.

Two functions which hash then apply a mask
are removed. The calls are replaced with
'cfs_hash_*' and manually applying the mask.

Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Ia4b27cb6fb1329b9df45c00f748a8d22178b0654
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49916
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: jsimmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>