test: add Ubuntu 14 docker build files

Based on the old docker-ubuntu14 branch.

test/docker/ubuntu14/Dockerfile

@@ -0,0 +1,28 @@
+FROM ubuntu:14.04
+
+RUN export DEBIAN_FRONTEND=noninteractive \
+    && apt-get update \
+    && apt-get -y upgrade \
+    && apt-get -y --no-install-recommends install \
+        autoconf \
+        automake \
+        make \
+        software-properties-common \
+        xvfb \
+    && apt-add-repository -y ppa:deadsnakes/ppa \
+    && apt-get update \
+    && apt-get -y --no-install-recommends install \
+        python3.6 \
+    && python3.6 -c "import urllib.request; urllib.request.urlretrieve('https://bootstrap.pypa.io/get-pip.py', '/tmp/get-pip.py')" \
+    && python3.6 /tmp/get-pip.py --prefix /usr/local
+
+ADD test-cmd-list.txt \
+    requirements.txt \
+    docker/ubuntu14/install-packages.sh \
+    /tmp/
+
+RUN set -x \
+    && python3.6 -m pip install --prefix /usr/local -Ir /tmp/requirements.txt
+
+RUN /tmp/install-packages.sh </tmp/test-cmd-list.txt \
+    && rm -r /tmp/* /root/.cache/pip /var/lib/apt/lists/*

test/docker/ubuntu14/install-packages.sh

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+#!/bin/bash
+set -xeuo pipefail
+
+cd ${TMPDIR:-/tmp}
+
+shopt -s extglob
+export DEBIAN_FRONTEND=noninteractive
+
+dpkg --add-architecture i386 # for wine
+
+apt-get update
+apt-get -y upgrade
+
+apt-get -y --no-install-recommends install \
+    apt-file \
+    curl \
+    software-properties-common
+
+apt-add-repository multiverse
+
+curl -sL https://deb.nodesource.com/setup_8.x | bash -
+apt-get -y --no-install-recommends install \
+    nodejs
+
+npm install -g jshint
+npm cache clean --force
+
+apt-file update
+
+excluded=$(
+    cat <<\EOF
+arping
+bcron-run
+bison++
+evince-gtk
+gdb-minimal
+gnat-4.6
+gnuspool
+heimdal
+inetutils-ping
+knot-dnsutils
+knot-host
+lpr
+lprng
+mariadb-client-5.5
+mariadb-client-core-5.5
+mplayer2
+mysql-client-5.5
+mysql-client-core-5.5
+netscript-2.4
+openresolv
+percona-xtradb-cluster-client-5.5
+postgres-xc-client
+python3.5-venv
+strongswan-starter
+sudo-ldap
+xserver-xorg-input-synaptics-lts-utopic
+xserver-xorg-input-synaptics-lts-vivid
+xserver-xorg-input-synaptics-lts-wily
+xserver-xorg-input-synaptics-lts-xenial
+EOF
+)
+
+while read -r file; do
+    case $file in
+        /*) printf "%s\n" "$file" ;;
+        *) printf "%s\n" {/usr,}/{,s}bin/"$file" ;;
+    esac
+done |
+    apt-file -lFf search - |
+    grep -vF "$excluded" |
+    xargs apt-get -y --no-install-recommends install
+
+# Required but not pulled in by dependencies:
+apt-get -y --no-install-recommends install \
+    libwww-perl \
+    postgresql-client