* updates all ios modules to support persistent socket
* adds ios action plugin to connect to device
* adds exec_command() to ios shared module
* fixes ios_config and ios_template local action
* update all unit test cases
* adds base test module for ios module testing
* updates the ios_config module to use the network_cli plugin
* updates the local action plugin to derive from network
* add unit test cases for ios_config
This adds a action plugin that will allow config and template modules
to be merged into a single module. Once completed this will supercede
the net_template action plugin.
Peter Sprygada
Peter Sprygada