* Adding a cli transport option for the bigip_command module.
* Fixing keyerror when using other f5 modules. Adding version_added for new option in bigip_command.
* Removing local connection check because the F5 tasks can be delegated to any host that has the libraries for REST.
* Using the network_common load_provider.
* Adding unit test to cover cli transport and updating previous unit test to ensure cli was not called.
