deployment: install locales-all by default

Let's see whether this enough to close issue #2367.

Open question: do we want to have locales-all also on systems
we did not deploy on our own (AKA CE systems installed using
ngcp-installer)? Iff so then we'd have to add it as dependency
somewhere.

Testing: https://bugtracker.sipwise.com/view.php?id=2367

From: Michael Prokop <mprokop@sipwise.com>

deployment.sh

@@ -753,10 +753,11 @@ cat > /etc/debootstrap/packages << EOF
 # addons: packages which d-i installs but debootstrap doesn't
 eject
 grub-pc
-locales
 pciutils
 usbutils
 ucf
+# locales -> but we want locales-all instead:
+locales-all
 
 # required e.g. for "Broadcom NetXtreme II BCM5709S Gigabit Ethernet"
 # lacking the firmware will result in non-working network on