dcm-* cli tools don't differentiate between optional and required arguments

[jimsander]

All parameters show as optional, rather than differentiating between optional and mandatory

i.e.

# # INCORRECT ##
usage: dcm-create-server [-h] [--productid PRODUCTID]
                         [--machineimage MACHINEIMAGE]
                         [--datacenter DATACENTER] [--description DESCRIPTION]
                         [--name NAME] [--budgetid BUDGETID]
                         [--keypair KEYPAIR] [--vlan VLAN]
                         [--userdata USERDATA]

## CORRECT ##
usage: dcm-create-server [-h] --productid <PRODUCTID>
                         --machineimage <MACHINEIMAGE>
                         --datacenter <DATACENTER>
                         --name <NAME> --budgetid <BUDGETID>
                         [--keypair KEYPAIR] 
                         [--vlan VLAN]
                         [--description DESCRIPTION]                                                                                                           
                         [--userdata USERDATA]

[igable]

I will look over the dcm-* tool and add the required=True flag where it's needed in the argparse config. Probably this will be targeted for 0.11.2 or 0.11.3

[igable]

Issue #220 is also this problem.