[recipes.py] move remote arg parsing to its module

unittests/remote_test.py

 #!/usr/bin/env python
 # Copyright 2016 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 import subprocess
 import sys
 import unittest
 
 import repo_test_util
 
 
 class RemoteTest(repo_test_util.RepoTest):
   def test_run(self):
     repos = self.repo_setup({'a': []})
     self.update_recipe_module(repos['a'], 'mod', {'foo': []})
     self.update_recipe(repos['a'], 'a_recipe', ['mod'], [('mod', 'foo')])
     try:
       subprocess.check_output([
           sys.executable, self._recipe_tool,
           '-v', '-v', 'remote',
           '--repository', repos['a']['root'],
           '--',
           'run',
           'a_recipe',
       ], stderr=subprocess.STDOUT)
     except subprocess.CalledProcessError as ex:
-      print >> sys.stdout, ex.message
+      print >> sys.stdout, ex.message, ex.output
       raise
 
 
 if __name__ == '__main__':
   sys.exit(unittest.main())