* - Netconf plugin addition for iosxr
- Utilities refactoring to support netconf and cliconf
- iosx_banner refactoring for netconf and cliconf
- Integration testcases changes to accomodate above changes
* Fix sanity failures, shippable errors and review comments
* fix pep8 issue
* changes run_command method to send specific command args
* - Review comment fixes
- iosxr_command changes to remove ComplexDict based command_spec
* - Move namespaces removal method from utils to netconf plugin
* Minor refactoring in utils and change in deprecation message
* rewrite build_xml logic and import changes for new utils dir structure
* - Review comment changes and minor changes to documentation
* * refactor common code and docs updates
