* Remove use of six.b as Python-2.6+ have byte literals.
* Make AnsibleModule a global object so we'll have access to it in all
the functions we're going to break this up into.
* Rework the parameters so things that are in file_common_args are used
from file_common_args or the reason for deviation is documented.
* Remove validate as a parameter: this should be taken care of by
removing it from params before the copy and template action plugin
invoke file.
* Rename diff_peek to _diff_peek as it is an internal parameter.
* add module_name execute_module call to assemble so that it is more greppable
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