Fix some tests and format code (#830)

* Increase some tls test timeout

* Fix TestUserValidator

* Change all tests to VMessAEAD

Old VMess MD5 tests will be rejected and fail in 2022

* Chore: auto format code

transport/internet/kcp/output.go

@@ -4,9 +4,8 @@ import (
 	"io"
 	"sync"
 
-	"github.com/xtls/xray-core/common/retry"
-
 	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/retry"
 )
 
 type SegmentWriter interface {