Replay upstream changes

packer/config/common.json

@@ -1,7 +1,7 @@
 {
   "build_target": "virt",
   "disable_public_repos": "false",
-  "extra_debs": "open-iscsi",
+  "extra_debs": "nfs-common open-iscsi",
   "extra_repos": "",
   "extra_rpms": "",
   "firstboot_custom_roles_post": "",
@@ -9,9 +9,9 @@
   "http_proxy": "",
   "https_proxy": "",
   "no_proxy": "",
-  "node_custom_roles_post": "custom",
+  "node_custom_roles_post": "",
   "node_custom_roles_pre": "",
-  "pause_image": "registry.k8s.io/pause:3.6",
+  "pause_image": "registry.k8s.io/pause:3.8",
   "pip_conf_file": "",
   "redhat_epel_rpm": "https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm",
   "reenable_public_repos": "true",