LU-16490 kernel: kernel update RHEL 7.9 [3.10.0-1160.81.1.el7]

LU-16490 kernel: kernel update RHEL 7.9 [3.10.0-1160.81.1.el7]

Update RHEL 7.9 kernel to 3.10.0-1160.81.1.el7.

Lustre-change: https://review.whamcloud.com/49684
Lustre-commit: TBD (from 0a6b9460584046c0344204ad5169efac4d791e59)

Test-Parameters: trivial clientdistro=el7.9 serverdistro=el7.9

Change-Id: I46f556f327d92fde17790e223187df5b1c33d2c1
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49704
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>