nebraska: Run only nebraska unittests

Add run_unittests to be able to easily run only nebraska unittests

BUG=chromium:920404
TEST=unittests

Change-Id: I660a53424d5f436b5b936352cc79b32e5d1e7106
Reviewed-on: https://chromium-review.googlesource.com/1404274
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Nicolas Norvez <norvez@chromium.org>
diff --git a/nebraska/run_unittests b/nebraska/run_unittests
new file mode 100755
index 0000000..61ed6b8
--- /dev/null
+++ b/nebraska/run_unittests
@@ -0,0 +1,14 @@
+#!/bin/bash
+# Copyright 2019 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Runs *_unittest.py modules.
+
+set -e
+
+# Invoke unit test scripts.
+for unittest_script in *_unittest.py; do
+  echo "Running ${unittest_script}"
+  ./${unittest_script} || break
+done