* 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
* removes unneeded supports_multiplexing var
* refactors terminal_prompts_re to terminal_stdout_re
* refactors terminal_errors_re to terminal_stderr_re
* updates network_cli unit test cases
This updates the network_cli connection plugin to attempt to automatically
determine the remote device os. The device network os discovery can
be overridden by setting the ansible_network_os value.
* adds new connection plugin `network_cli` which builds on paramiko
* adds new plugin `terminal` used for manipulating network_cli terminals
* adds new field to play_context `network_os` settable as ansible_network_os
This commit adds the plugins necesary to establish a persistent cli connection
to network devices of ssh. It builds on the paramiko connection plugin
to create a shell environment that will persistent through ansible-connection.
The `newtork_cli` plugin then uses the network_os in the instance of
PlayContext to load the appropriate network OS environment plugin for
handling opening and closing of shells as well as privilege escalation.