LU-16076 utils: enhance 'lfs check' command

LU-16076 utils: enhance 'lfs check' command

Add optional argument to 'lfs check' command so that only the
servers related to the specified lustre file system is checked.

Signed-off-by: Lei Feng <flei@whamcloud.com>
Test-Parameters: trivial testlist=sanityn env=ONLY=113
Change-Id: I826a8e822af0a290f06ffaadadf1bb7f86899d99
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/48155
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Emoly Liu <emoly@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>