fix: auto set vmid when creating host from Foreman API (#312)

fixes #254

app/models/foreman_fog_proxmox/proxmox_vm_commands.rb

@@ -32,10 +32,9 @@ def start_on_boot(vm, args)
     end
 
     def create_vm(args = {})
-      vmid = args[:vmid].to_i
       type = args[:type]
       node = client.nodes.get(args[:node_id])
-      vmid = node.servers.next_id.to_i if vmid < 1
+      vmid = args[:vmid] = assign_vmid(args[:vmid].to_i, node)
       raise ::Foreman::Exception, format(N_('invalid vmid=%<vmid>s'), vmid: vmid) unless node.servers.id_valid?(vmid)
 
       image_id = args[:image_id]
@@ -55,6 +54,10 @@ def create_vm(args = {})
       raise e
     end
 
+    def assign_vmid(vmid, node)
+      vmid < 1 ? node.servers.next_id : vmid
+    end
+
     def compute_clone_attributes(args, container, type)
       args = parse_cloudinit_config(args) if args[:user_data]
       parsed_args = parse_typed_vm(args, type)