Crash with list-ip-addresses

[JasonRShaver]

jasonsha@JasonShaMBP: ~/temp/demo513 $ az vm list-ip-addresses -resource-group demo513
usage: az [-h] [--output {list,json,tsv}] [--verbose] [--debug]
[--query JMESPATH]
{vm} ...
az: error: unrecognized arguments: -resource-group demo513
jasonsha@JasonShaMBP: ~/temp/demo513 $ az vm list-ip-addresses --resource-group demo513
list_ip_addresses() got an unexpected keyword argument 'resource_group_name'
jasonsha@JasonShaMBP: ~/temp/demo513 $ az vm list-ip-addresses -g demo513
list_ip_addresses() got an unexpected keyword argument 'resource_group_name'
jasonsha@JasonShaMBP: ~/temp/demo513 $ az vm list-ip-addresses -g demo513 --vm-name demo513vm
list_ip_addresses() got an unexpected keyword argument 'resource_group_name'

[derekbekoe]

PR #222 fixes this