Add a run_eslint wrapper script

common/node_runner/bin/test_node_for_smoke

 #!/usr/bin/env python

[nednguyen, 2016/09/23 10:17:49]

We can now remove this & change the catapult_build/build_steps.py to run the	
common/eslint/bin/run_eslint instead. 

Having a circular dependency between node_runner & eslint is bad

[charliea (OOO until 10-5), 2016/09/23 13:06:35]

Good idea. Done.

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import sys
 
-_NODE_RUNNER_PATH = os.path.abspath(
-    os.path.join(os.path.dirname(__file__), '..'))
 
-
-_PY_UTILS_PATH = os.path.abspath(

[charliea (OOO until 10-5), 2016/09/23 03:18:23]

(I think that this was unused)

-    os.path.join(_NODE_RUNNER_PATH, '..', 'py_utils'))
+_ESLINT_PATH = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), os.path.pardir, os.path.pardir,
+                 os.path.pardir, 'common', 'eslint'))
 
 
 def _AddToPathIfNeeded(path):
   if path not in sys.path:
     sys.path.insert(0, path)
 
 
 if __name__ == '__main__':
-  _AddToPathIfNeeded(_NODE_RUNNER_PATH)
-  _AddToPathIfNeeded(_PY_UTILS_PATH)
+  _AddToPathIfNeeded(_ESLINT_PATH)
 
-  from node_runner import node_util
-  print node_util.RunEslint()
+  from eslint import eslint
+  print eslint.RunEslint()
   sys.exit(0)