MT#16391 Initial autopkgtest test

Make sure ngcpcfg binary is available and installed
appropriately for execution.

Provide placeholder files for the configuration files
that are needed for ngcpcfg execution.

This serves as a starting point for further system tests
during Debian package build time.

Change-Id: I70dca5e4bed6a896f31c3a3eb909da17e496fc92

debian/tests/basic-binary

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+set -eu
+
+if ! ngcpcfg 2>&1 | grep -q 'Error: Configuration file' ; then
+  echo "Error: ngcpcfg doesn't detect missing configuration file(s)." >&2
+  ngcpcfg
+  exit 1
+fi
+
+touch /etc/ngcp-config/config.yml
+touch /etc/ngcp-config/constants.yml
+touch /etc/ngcp-config/network.yml
+
+mkdir /etc/ngcp-config/templates
+
+if ! ngcpcfg 2>&1 | grep -q 'Usage: ngcpcfg' ; then
+  echo "ngcpcfg usage information not displayed:" >&2
+  ngcpcfg
+  exit 1
+fi

debian/tests/control

@@ -0,0 +1 @@
+Tests: basic-binary