LU-6142 lfsck: SPDX for Lustre FS checker

LU-6142 lfsck: SPDX for Lustre FS checker

Convert from verbose license text to SDPX.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Ie02c2bcc775520e8710880b5e91a545c4a922f60
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55927
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>