LU-12620 kernel: kernel update RHEL 8.0 [4.18.0-80.7.1.el8_0]

LU-12620 kernel: kernel update RHEL 8.0 [4.18.0-80.7.1.el8_0]

Update RHEL 8.0 kernel to 4.18.0-80.7.1.el8_0 for Lustre client.

Test-Parameters: trivial clientdistro=el8 \
envdefinitions=SANITY_EXCEPT="421a" \
testlist=sanity

Change-Id: I9a78ad00d1503cc90f5975e349fe96d452b1174f
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/35657
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>