* Add EOS provider options as subspec
* Add IOS provider options as subspec
* Add IOS XR provider options as subspec
* Add Junos provider options as subspec
* Add NX-OS provider options as subspec
* Add Vyos provider options as subspec
* Remove password checks from check_args
* Do the same to aireos, aruba, ce, dellos*, & sros, as they work the same way
* VyOS does not support `transport`