[Proxmox] FIX: tests, add required iso_file to basic iso config tests

builder/proxmox/common/config.go

@@ -58,8 +58,6 @@ type Config struct {
 	CloudInit            bool   `mapstructure:"cloud_init"`
 	CloudInitStoragePool string `mapstructure:"cloud_init_storage_pool"`
 
-	shouldUploadISO bool
-
 	AdditionalISOFiles []storageConfig `mapstructure:"additional_iso_files"`
 	VMInterface        string          `mapstructure:"vm_interface"`
 

builder/proxmox/iso/config_test.go

@@ -227,5 +227,6 @@ func mandatoryConfig(t *testing.T) map[string]interface{} {
 		"password":     "supersecret",
 		"node":         "my-proxmox",
 		"ssh_username": "root",
+    "iso_file": "local:iso/Fedora-Server-dvd-x86_64-29-1.2.iso",
 	}
 }