merge functions from ios into ios_config
merge functions from ios into ios_config

* merge changes from ios shared module functions into ios_config.
* add src argument to provide path to config file
* add new choice to match used to ignore current running config
* add update argument with choices merge or check
* add backup argument to backup current running config to control host
* add defaults argument to control collection of config with or withoutdefaults
* add save argument to save current running config to startup config
* add state argument to control state of config file
* deprecated force argument, use match=none instead

thaim/ansible,thaim/ansible