LU-9619 misc: add Test-Parameters to git-hook

LU-9619 misc: add Test-Parameters to git-hook

Add commented out example Test-Parameters lines
to git hook. This makes it easier to add them
in when appropriate.

Add short explaination for test parameters and
for Developer Certificate of Origin.

Update the file header to have the SPDX
license and use the standard format.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: I6af3075339f15a3c4fc4134111f47a2899005c56
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/50298
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Charlie Olmstead <charlie@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>