* arguments for vyos_config for 2.2 are now complete
* adds loading config file from disk (src argument)
* removes unsupported rollback argument
* changes update_config to update with options merge or check
* changes backup_config to backup
* add state argument for state of configuration file
* adds backup argument to backup current configuration
* adds save argument to control if active config is saved to disk
* adds comment argument for setting commit comment
* adds match argument to control configuraiton match
Tested with VyOS 1.7
* commands argument now accepts a dict arguments
* waitfor has been renamed to wait_for with an alias to waitfor
* only show commands are allowd when check mode is specified
* config mode is no longer allowed in the command stack
* add argument match with valid values any, all
