* Update task definitions for network_cli
* Add connection to debug messages
* Specify connection for prepare task
* pc won't be around for connection=network_cli
* Assorted Python 3 fixes
* Give default port if ansible_ssh_port missing
* delegate -> connection
* Extend error regex
* updates all iosxr modules to support persistent socket
* adds iosxr action plugin to connect to device
* adds exec_command() to iosxr shared module
* fixes iosxr_config and iosxr_template local action
* update all unit test cases
* adds base test module for iosxr module testing
This completes the refactor of the iosxr 2.2 shared module. It also
includes the iosxr_config action plugin to be implemented by the
iosxr_config module for 2.2
Nathaniel Case
David Newswanger
Peter Sprygada
Peter Sprygada