* Fixing aruba's inconsitent indenting.
* Adding config with different children indentation and unit test to confirm the different spacing does not matter.
* Fixing pylint check. Missed an r prefix.
* move set_module_args to units.modules.utils
* unit tests: reuse set_module_args
* unit tests: mock exit/fail_json in module.utils.ModuleTestCase
* unit tests: use module.utils.ModuleTestCase
* unit tests: fix 'import shadowed by loop variable'
