Add kernel version for RHEL 8.8

Signed-off-by: Hanwen <hanwenli@amazon.com>

Author: hanwen-cluster

cookbooks/aws-parallelcluster-common/resources/lustre/lustre_redhat8.rb

@@ -44,12 +44,14 @@ def find_os_minor_version
   kernel_patch_version = find_kernel_patch_version
 
   # kernel patch versions under 193 are prior to RHEL 8.2
+  # kernel patch version number can be retrieved from https://access.redhat.com/articles/3078#RHEL8
   os_minor_version = '2' if kernel_patch_version >= '193'
   os_minor_version = '3' if kernel_patch_version >= '240'
   os_minor_version = '4' if kernel_patch_version >= '305'
   os_minor_version = '5' if kernel_patch_version >= '348'
   os_minor_version = '6' if kernel_patch_version >= '372'
   os_minor_version = '7' if kernel_patch_version >= '425'
+  os_minor_version = '8' if kernel_patch_version >= '477'
 
   os_minor_version
 end

cookbooks/aws-parallelcluster-common/spec/unit/resources/lustre_setup_spec.rb

@@ -189,7 +189,7 @@ def self.setup(chef_run)
     end
   end
 
-  [%w(193 2), %w(240 3), %w(305 4), %w(348 5), %w(372 6), %w(425 7)].each do |kernel_patch, minor_version|
+  [%w(193 2), %w(240 3), %w(305 4), %w(348 5), %w(372 6), %w(425 7), %w(477 8)].each do |kernel_patch, minor_version|
     context "on redhat with kernel from 4.18.0-#{kernel_patch}.3.1.el8 supporting lustre" do
       cached(:chef_run) do
         runner = ChefSpec::Runner.new(