Fix gofmt warnings

client/driver/docker.go

@@ -564,10 +564,10 @@ func (d *DockerDriver) Validate(config map[string]interface{}) error {
 			"userns_mode": {
 				Type: fields.TypeString,
 			},
-			"sysctl": &fields.FieldSchema{
+			"sysctl": {
 				Type: fields.TypeArray,
 			},
-			"ulimit": &fields.FieldSchema{
+			"ulimit": {
 				Type: fields.TypeArray,
 			},
 			"port_map": {

client/driver/docker_test.go

@@ -865,7 +865,7 @@ func TestDockerDriver_Sysctl_Ulimit(t *testing.T) {
 		"nofile": "2048:4096",
 	}
 	task.Config["sysctl"] = []map[string]string{
-		map[string]string{
+		{
 			"net.core.somaxconn": "16384",
 		},
 	}