TT#28953 Ensure we have wget available by default

wget in Debian/buster:

| Package: wget
| Version: 1.19.5-1
| [...]
| Priority: standard

wget in Debian/stretch and earlier:

| Package: wget
| Version: 1.18-5+deb9u2
| [...]
| Priority: important

To ensure we still have wget available inside the
Debian system, e.g. for retrieving the ngcp-installer*.deb
file, we need to add it to the package selection.

The ngcp-nth-* packages also include wget in their dependencies,
ngcp-installer also checks and adds it, though it's too late
there for bootstrapping our systems, as we're e.g. retrieving the
installer deb + checking for PPAs using wget.

While at it move the slightly misleading comment to the
appropriate place.

Change-Id: I971b2d06528a33b1dc4c310feef83c32e10ae557

templates/scripts/includes/deployment.sh

@@ -1079,7 +1079,6 @@ echo > /etc/debootstrap/packages
 
 if ! "$NGCP_INSTALLER" ; then
   echo "Install some packages to be able to login on the Debian plain system"
-  # WARNING: consider to add NGCP packages to NGCP metapackage!
   cat >> /etc/debootstrap/packages << EOF
 # to be able to login on the Debian plain system via SSH
 openssh-server
@@ -1087,6 +1086,13 @@ openssh-server
 # deployment supports LVM only
 lvm2
 EOF
+else
+  echo "Install some essential packages for NGCP bootstrapping"
+  # WARNING: consider to add NGCP packages to NGCP metapackage!
+  cat >> /etc/debootstrap/packages << EOF
+# to be able to retrieve files, starting with Debian/buster no longer present by default
+wget
+EOF
 fi
 
 # NOTE: we use the debian.sipwise.com CNAME by intention here