fix: auto set vmid when creating host from Foreman API

fixes #254

app/models/foreman_fog_proxmox/proxmox_vm_commands.rb

@@ -31,11 +31,12 @@ def start_on_boot(vm, args)
       vm
     end
 
+    # rubocop:disable Metrics/AbcSize
     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 = node.servers.next_id.to_i if args[:vmid].to_i < 1 || args[:vmid].nil?
+      args[:vmid] = vmid if args[:vmid].nil?
       raise ::Foreman::Exception, format(N_('invalid vmid=%<vmid>s'), vmid: vmid) unless node.servers.id_valid?(vmid)
 
       image_id = args[:image_id]
@@ -54,6 +55,7 @@ def create_vm(args = {})
       destroy_vm id.to_s + '_' + vm.vmid.to_s if vm
       raise e
     end
+    # rubocop:enable Metrics/AbcSize
 
     def compute_clone_attributes(args, container, type)
       args = parse_cloudinit_config(args) if args[:user_data]