Add script for running all smoketests at once

theodolite-benchmarks/docker-test/smoketest-runner-all.sh

+#!/bin/sh
+
+find . -name 'test.sh' -type f -exec dirname {} \; |
+    sort |
+    xargs -I %s sh -c "./smoketest-runner.sh %s 1>&2; echo $?" |
+    sort |
+    awk '{count[$1!=0]++} END {print count[0] " tests successful, " count[1] " test failed."}; exit count[1]'