cros_run_vm_test: Move to lib/cros_test.py

* Move code to lib/cros_test.py
* Create CLI stub cros_test.py
* Soft link cros_run_vm_test.py to cros_test.py
* Soft link bin/cros_test

BUG=chromium:894730
TEST=cros_run_vm_test; cros_run_test

Change-Id: Ifacff727697390e6af5a1590bd9c1ed44dce3200
Reviewed-on: https://chromium-review.googlesource.com/1345533
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Achuith Bhandarkar <achuith@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
diff --git a/scripts/cros_run_test.py b/scripts/cros_run_test.py
new file mode 100644
index 0000000..daf39b3
--- /dev/null
+++ b/scripts/cros_run_test.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+# Copyright 2016 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.
+
+"""CLI for running Chrome OS tests from lib/cros_test.py."""
+
+from __future__ import print_function
+
+from chromite.lib import cros_test
+
+def main(argv):
+  opts = cros_test.ParseCommandLine(argv)
+  opts.Freeze()
+  return cros_test.CrOSTest(opts).Run()