tests(packer): cleanup cloud init files.

tests/packer/init/archlinux-gnome.user-data.yml

@@ -45,7 +45,7 @@ packages:
 
   # Install Graphical Interface
   - gnome
-  - gnome-extra 
+  - gnome-extra
   - seahorse
   - alacarte
 
@@ -55,25 +55,24 @@ packages:
   - terminator
 
 runcmd:
-
   # Regenerate grub.cfg
-  - [ grub-mkconfig, -o, /boot/grub/grub.cfg ]
+  - grub-mkconfig -o /boot/grub/grub.cfg
 
   # Remove swapfile
-  - [ swapoff, -a ]
-  - [ rm, -rf, /swap/ ]
-  - [ sed, -e, "/swap/d", -i, /etc/fstab ]
+  - swapoff -a
+  - rm -rf /swap/
+  - sed -e "/swap/d" -i /etc/fstab
 
   # Enable core services
-  - [ systemctl, enable, apparmor ]
-  - [ systemctl, enable, auditd ]
-  - [ systemctl, enable, gdm ]
-  - [ systemctl, enable, NetworkManager ]
-  - [ systemctl, enable, rngd ]
-  - [ systemctl, enable, systemd-timesyncd.service ]
+  - systemctl enable apparmor
+  - systemctl enable auditd
+  - systemctl enable gdm
+  - systemctl enable NetworkManager
+  - systemctl enable rngd
+  - systemctl enable avahi-daemon
+  - systemctl enable systemd-timesyncd.service
 
 write_files:
-
   # Enable AppArmor in kernel parameters
   - path: /etc/default/grub
     append: true