ubuntu 20.04 and ansible file cleanup

packer/http/preseed-ubuntu20.04.cfg

+d-i preseed/include string ../preseed-ubuntu.cfg
+
+d-i preseed/early_command string                                                                                                                \
+        mkdir -p /usr/lib/post-base-installer.d &&                                                                                              \
+        echo "sed -i -e 's/^in-target.*tasksel.*/#\\0/' /var/lib/dpkg/info/pkgsel.postinst" > /usr/lib/post-base-installer.d/90skip-tasksel &&  \
+        chmod +x /usr/lib/post-base-installer.d/90skip-tasksel
+
+d-i preseed/late_command string                                                   \
+        echo 'Defaults:slapos !requiretty' > /target/etc/sudoers.d/slapos;        \
+        echo 'slapos ALL=(ALL) NOPASSWD: ALL' >> /target/etc/sudoers.d/slapos;    \
+        chmod 440 /target/etc/sudoers.d/slapos ;                                  \
+        ln -sf /dev/null /target/etc/systemd/network/99-default.link;             \
+        in-target update-initramfs -u

packer/ubuntu-20.04-server-amd64.json

+{
+  "variables": {
+    "user": "slapos",
+    "password": "slapos",
+    "domain": "",
+    "disk_size": "20",
+    "name": "image",
+    "custom_script": "scripts/empty.sh"
+  },
+
+  "builders":
+  [
+    {
+      "name": "ubuntu-20.04-server-{{ user `disk_size`}}G-{{ user `name`}}",
+
+      "type": "qemu",
+      "format": "qcow2",
+      "accelerator": "kvm",
+      "disk_size": "{{ user `disk_size`}}000",
+      "headless": true,
+
+      "iso_checksum": "9d2b54506f8f9fdad6b72e45aff0f0de",
+      "iso_url": "http://cdimage.ubuntu.com/ubuntu-legacy-server/releases/20.04/release/ubuntu-20.04-legacy-server-amd64.iso",
+      "iso_checksum_type": "md5",
+
+      "http_directory": "http",
+
+      "ssh_username": "{{user `user`}}",
+      "ssh_password": "{{user `password`}}",
+      "ssh_wait_timeout": "1800s",
+      "shutdown_command": "echo '{{user `password`}}'|sudo -S shutdown -P now",
+
+      "boot_wait": "2s",
+      "boot_command": [
+        "<esc><wait>",
+        "<esc><wait>",
+        "<enter><wait>",
+        "/install/vmlinuz ",
+        "initrd=/install/initrd.gz ",
+        "auto=true ",
+        "debconf/priority=critical ",
+        "keyboard-configuration/modelcode=pc105 keyboard-configuration/layout=FR ",
+        "keyboard-configuration/variant=FR console-setup/ask_detect=false ",
+        "net.ifnames=0 ",
+        "hostname={{ .Name }} ",
+        "passwd/user-fullname={{user `user`}} ",
+        "passwd/user-password-again={{user `password`}} ",
+        "passwd/user-password={{user `password`}} ",
+        "passwd/username={{user `user`}} ",
+        "noapic ",
+        "preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/preseed-ubuntu20.04.cfg ",
+        "-- <enter>"
+
+      ]
+    }
+  ],
+
+  "provisioners": [
+    {
+      "type": "shell",
+      "execute_command": "echo '{{user `password`}}' | {{.Vars}} sudo -E -S bash '{{.Path}}'",
+      "scripts": [
+        "scripts/update-ubuntu.sh",
+        "scripts/grub-ubuntu.sh",
+        "{{ user `custom_script` }}"
+      ]
+    }
+  ]
+}
+