Move the arguments module into cli/ and context_objects into utils

* Note: Python2 is not as intelligent at detecting false import loops as
  Python3.  context_objects.py cannot be added to cli/arguments because it
  would set up an import loop between cli/__init__.py,
  cli/arguments/context_objects.py, and context.py on Python2.

ci_complete

test/units/cli/arguments/test_optparse_helpers.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+# Copyright: (c) 2018, Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division)
+__metaclass__ = type
+
+import pytest
+
+from ansible.cli.arguments import optparse_helpers as opt_help
+
+
+class TestOptparseHelpersVersion:
+
+    def test_version(self):
+        ver = opt_help.version('ansible-cli-test')
+        assert 'ansible-cli-test' in ver
+        assert 'python version' in ver

test/units/cli/test_galaxy.py

@@ -27,13 +27,13 @@ import tempfile
 import yaml
 
 from ansible import context
-from ansible.arguments import context_objects as co
-from ansible.arguments import optparse_helpers as opt_help
+from ansible.cli.arguments import optparse_helpers as opt_help
 from ansible.cli.galaxy import GalaxyCLI
-from units.compat import unittest
-from units.compat.mock import call, patch
 from ansible.errors import AnsibleError, AnsibleOptionsError
 from ansible.module_utils.six import PY3
+from ansible.utils import context_objects as co
+from units.compat import unittest
+from units.compat.mock import call, patch
 
 
 class TestGalaxy(unittest.TestCase):