* 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'
* - Adds iosxr_netconf module to configure netcong service on Cisco
IOS-XR devices
* - Adds Integration test for module
- Handles diff return from load_config
* - Adds unit test for iosxr_netconf module