Fix VM getters to work with shutdown VMs

convertSDKNicConfiguration() was assuming that VMs will have an active
NIC configuration. This is not the case for shutdown VMs, so we need to
account for that.

Signed-off-by: Aravindh Puthiyaparambil <aravindh.foss@pm.me>

vm.go

@@ -536,12 +536,28 @@ func convertSDKInitialization(sdkObject *ovirtsdk.Vm) (*initialization, error) {
 }
 
 func convertSDKNicConfiguration(sdkObject *ovirtsdk.NicConfiguration) NicConfiguration {
-	ipv4 := sdkObject.MustIp()
+	name, _ := sdkObject.Name()
+	ipv4, ok := sdkObject.Ip()
+	if !ok {
+		return NewNicConfiguration(
+			name, IP{
+				Address: "",
+				Gateway: "",
+				Netmask: "",
+				Version: IPVERSION_V4,
+			},
+		)
+	}
+
+	// It is fine for these values to be empty strings to account for shutdown VMs where these values are not set.
+	address, _ := ipv4.Address()
+	gateway, _ := ipv4.Gateway()
+	netmask, _ := ipv4.Netmask()
 	nicConfiguration := NewNicConfiguration(
-		sdkObject.MustName(), IP{
-			Address: ipv4.MustAddress(),
-			Gateway: ipv4.MustGateway(),
-			Netmask: ipv4.MustNetmask(),
+		name, IP{
+			Address: address,
+			Gateway: gateway,
+			Netmask: netmask,
 			Version: IPVERSION_V4,
 		},
 	)