Improve firewall cancel command

[allmightyspiff]

I can't seem to cancel this multiVlan firewall. I should be able to cancel it. The help message should also show the available types of firewalls. Also add that information to the detail command

$ slcli firewall cancel multiVlan:17438
This action will cancel a firewall from your account. Continue? [y/N]: y
Unknown firewall type: multiVlan

$ slcli firewall cancel 17438
Invalid ID 17438: ID should be of the form xxx:yyy

$ slcli firewall cancel --help
Usage: slcli firewall cancel [OPTIONS] IDENTIFIER

        Cancels a firewall.

┌────┬────────────┬─────────────────────────────┐
│    │ identifier │                             │
│ -h │ --help     │ Show this message and exit. │
└────┴────────────┴─────────────────────────────┘


$ slcli firewall list
             Single Server Firewalls
┌─────────────┬──────┬──────────┬────────────────┐
│ firewall id │ type │ features │ server/vlan id │
├─────────────┼──────┼──────────┼────────────────┤
└─────────────┴──────┴──────────┴────────────────┘
                                                                     Multi Vlan Firewall
┌───────┬─────────────────────┬───────────────────────────────────┬───────────────────┬──────────┬────────────────┬──────────────┬─────────────────┬────────┐
│  Id   │      firewall       │               type                │     Hostname      │ Location │   Public Ip    │  Private Ip  │ Associated vlan │ status │
├───────┼─────────────────────┼───────────────────────────────────┼───────────────────┼──────────┼────────────────┼──────────────┼─────────────────┼────────┤
│ 17438 │ testFirewall-cgallo │ fortigate-security-appliance-10gb │ dft03.pod03.dal13 │  dal13   │ 67.228.206.245 │ 10.37.115.70 │        0        │ ACTIVE │
└───────┴─────────────────────┴───────────────────────────────────┴───────────────────┴──────────┴────────────────┴──────────────┴─────────────────┴────────┘

[allmightyspiff]

TODO

• Refactor this cancel command to we don't have to specify 'multiVlan', which might be done as part of Firewall refactor identifiers #1820
• Once we have the ID, we should be able to cancel it by looking up the billing item and putting in a cancellation for that.