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

app/dns/dns_test.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/miekg/dns"
+
 	"github.com/xtls/xray-core/app/dispatcher"
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/app/policy"