Sort imports intro three blocks (stdlib, non-stdlib, current prj)

internal/server/user/mux/gorillize.go

@@ -3,8 +3,9 @@ package mux
 import (
 	"net/http"
 
-	"github.com/BBVA/kapow/internal/server/model"
 	"github.com/gorilla/mux"
+
+	"github.com/BBVA/kapow/internal/server/model"
 )
 
 func gorillize(rs []model.Route, buildHandler func(model.Route) http.Handler) *mux.Router {

internal/server/user/mux/mux.go

@@ -4,8 +4,9 @@ import (
 	"net/http"
 	"sync"
 
-	"github.com/BBVA/kapow/internal/server/model"
 	"github.com/gorilla/mux"
+
+	"github.com/BBVA/kapow/internal/server/model"
 )
 
 type SwappableMux struct {