After the connection refactor if response value returned from
the remote device is empty in that case an `ok` return value is send
to module side code. To avoid this do not overwrite the empty response
received from remote device in `jsonrpc` reply.
* implements jsonrpc message passing for ansible-connection
* implements more generic mechanism for persistent connections
* starts persistent connection in task_executor if enabled and supported
* supports using network_cli as top level connection plugin
* enhances logging for persistent connection to stdout
* Update action plugins
* Fix Python3 RPC
* Fix Junos bytes<-->str issues
* supports using netconf as top level connection plugin
* Error message when running netconf on an unsupported platform
* Update tests
* Fix `authorize: yes` for `connection: local`
* Handle potentially JSON data in terminal
* Add clarifying detail if possible on ConnectionError
* Add junos_system declartive module and other related change
* junos_system declartive module
* integration test for junos_system
* integration test for net_system (junos platform)
* pep8 fixes for junos modules
* move to lxml from elementree for xml parsing as it support
complete set of xpath api's
* other minor changes
* Fix CI and doc changes
* Fix unit test failures
* Fix typo in import
* Fix import issue for py2.6
* Add missed Element in import
