Save the command line arguments into a global context

* Once cli args are parsed, they're constant.  So, save the parsed args
  into the global context for everyone else to use them from now on.
* Port cli scripts to use the CLIARGS in the context
* Refactor call to parse cli args into the run() method
* Fix unittests for changes to the internals of CLI arg parsing
* Port callback plugins to use context.CLIARGS
  * Got rid of the private self._options attribute
  * Use context.CLIARGS in the individual callback plugins instead.
  * Also output positional arguments in default and unixy plugins
  * Code has been simplified since we're now dealing with a dict rather
    than Optparse.Value

lib/ansible/context.py

@@ -0,0 +1,53 @@
+# Copyright: (c) 2018, Toshio Kuratomi <tkuratomi@ansible.com>
+# 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, print_function)
+__metaclass__ = type
+
+"""
+Context of the running Ansible.
+
+In the future we *may* create Context objects to allow running multiple Ansible plays in parallel
+with different contexts but that is currently out of scope as the Ansible library is just for
+running the ansible command line tools.
+
+These APIs are still in flux so do not use them unless you are willing to update them with every Ansible release
+"""
+
+from ansible import arguments
+
+
+# Note: this is not the singleton version.  That is only created once the program has actually
+# parsed the args
+CLIARGS = arguments.CLIArgs({})
+
+
+class _Context:
+    """
+    Not yet ready for Prime Time
+
+    Eventually this may allow for code which needs to run under different contexts (for instance, as
+    if they were run with different command line args or from different current working directories)
+    to exist in the same process.  But at the moment, we don't need that so this code has not been
+    tested for suitability.
+    """
+    def __init__(self):
+        global CLIARGS
+        self._CLIARGS = arguments.CLIArgs(CLIARGS)
+
+    @property
+    def CLIARGS(self):
+        return self._CLIARGS
+
+    @CLIARGS.setter
+    def CLIARGS_set(self, new_cli_args):
+        if not isinstance(new_cli_args, arguments.CLIArgs):
+            raise TypeError('CLIARGS must be of type (ansible.arguments.CLIArgs)')
+        self._CLIARGS = new_cli_args
+
+
+def _init_global_context(cli_args):
+    """Initialize the global context objects"""
+    global CLIARGS
+    CLIARGS = arguments.GlobalCLIArgs.from_options(cli_args)