Fix goimports

cmd/dex/config_test.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"github.com/dexidp/dex/server"
 	"testing"
 
 	"github.com/ghodss/yaml"
@@ -9,6 +8,7 @@ import (
 
 	"github.com/dexidp/dex/connector/mock"
 	"github.com/dexidp/dex/connector/oidc"
+	"github.com/dexidp/dex/server"
 	"github.com/dexidp/dex/storage"
 	"github.com/dexidp/dex/storage/sql"
 )