(CAT-7110) Add CentOS 9 support

 - Also install kmod (depmod command) in CentOS 9 as it doesn't come pre-intalled.

Author: shubhamshinde360

metadata.json

@@ -26,7 +26,8 @@
       "operatingsystem": "CentOS",
       "operatingsystemrelease": [
         "7",
-        "8"
+        "8",
+        "9"
       ]
     },
     {

spec/spec_helper_acceptance_local.rb

@@ -42,6 +42,7 @@ def iptables_version
 def pre_setup
   LitmusHelper.instance.run_shell('mkdir -p /lib/modules/`uname -r`')
   LitmusHelper.instance.run_shell('yum install module-init-tools -y') if fetch_os_name == 'rocky'
+  LitmusHelper.instance.run_shell('dnf install -y kmod') if fetch_os_name == 'centos' && fetch_os_version == '9'
   LitmusHelper.instance.run_shell('depmod -a')
 end
 
@@ -54,6 +55,10 @@ def fetch_os_name
   @fetch_os_name ||= LitmusHelper.instance.run_shell('facter os.name').stdout.delete("\n").downcase
 end
 
+def fetch_os_version
+  @fetch_os_name ||= LitmusHelper.instance.run_shell('facter os.release.full').stdout.delete("\n")
+end
+
 RSpec.configure do |c|
   # This flag is disabling test 'condition' from firewall_attributes_exceptions
   # because this test is failing on docker containers, but it's compatible with vmpooler machines