* fix nxos_l3_interface tests as n35 doesn't support ipv6
* add terminal dont-ask to nxos_feature and nxos_lldp
* put interfaces in L2 mode for N35
* fix nxos_feature unit-tests
* 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'
* Extend tests to have multiple device representations
* Move filepath munging to nxos_module
* Device needs to be kwarg so we can leave it off
* Update other nxos tests
* Update tests that fell through