add grub timeout and OpenStack data srouce

Author: g0rgamesh

etc/kayobe/stackhpc-overcloud-dib.yml

@@ -37,7 +37,9 @@ stackhpc_overcloud_dib_elements:
 stackhpc_overcloud_dib_env_vars:
   DIB_BLOCK_DEVICE_CONFIG: "{{ stackhpc_overcloud_dib_block_device_config_uefi_lvm }}"
   DIB_BOOTLOADER_DEFAULT_CMDLINE: "nofb nomodeset gfxpayload=text net.ifnames=1 rd.auto"
-  DIB_CLOUD_INIT_DATASOURCES: "ConfigDrive"
+  DIB_GRUB_TIMEOUT: "5"
+  DIB_GRUB_TIMEOUT_STYLE: "countdown"
+  DIB_CLOUD_INIT_DATASOURCES: "OpenStack, ConfigDrive"
   DIB_CONTAINERFILE_RUNTIME: "docker"
   DIB_CONTAINERFILE_NETWORK_DRIVER: "host"
   DIB_CONTAINERFILE_DOCKERFILE: "/opt/kayobe/src/stackhpc-image-elements/elements/rocky-container-stackhpc/containerfiles/9-stackhpc"