Add tools/test-backend script to run backend tests.

(imported from commit fde4c7deb1e64e8cca9d62cda905f13d90392961)

tools/test-all

@@ -17,6 +17,6 @@ function run {
 
 run 'lint checkers'    ./tools/check-all
 run 'web client tests' ./zephyr/tests/frontend/run
-run 'server tests'     ./manage.py test zephyr --skip-generate
+run 'server tests'     ./tools/test-backend
 
 printf '\n\e[32mAll OK!\e[0m\n'

tools/test-backend

@@ -0,0 +1,4 @@
+#!/bin/bash -e
+
+cd "$(dirname "$0")"/..
+./manage.py test zephyr --skip-generate --settings=humbug.test_settings