In mod_args we were checking `isinstance(thing, NoneType)` when
thing is None works the same since NoneType can't be subclassed in
python 2 or 3 and it removes the need for the NoneType import.
Dynamic task includes still need some work, this is a rough first version.
* doesn't work with handler sections of playbooks yet
* when using include + with*, the insertion order is backwards
* fix potential for task lists to be unsynchronized when using the linear
strategy, as the include conditional could be predicated on an inventory
variable
* moved old unittests for vault over to the new codebase
* reverted YAML error helpers and reverted the load() function
in parsing/__init__.py, pending a rewrite of a new YAML loader
class of some kind to encapsulate all of that
* fixed an error in in the module args parser regarding the shell/
command argument parsing, where some additional arguments were
being lost
Rory Finnegan
James Cammarata
Toshio Kuratomi
Michael DeHaan
Michael DeHaan