🐛 respect owner user id references when importing (#8693)

closes #8691 

There was a condition added when i've refactored the importer.

> if (models.User.isOwnerUser(obj[key])) {

This condition is absolutely wrong! If you import an owner user, this owner user get's imported as administrator. But the original owner user id reference must be updated as well, so that the reference points to the new administrator id ✌🏻

core/server/data/importer/importers/data/base.js

@@ -154,7 +154,7 @@ class Base {
      *  - we update all fields after the import (!)
      */
     afterImport(options) {
-        let self = this, dataToEdit = {}, oldUser;
+        let self = this, dataToEdit = {}, oldUser, context;
 
         debug('afterImport', this.modelName);
 
@@ -164,12 +164,9 @@ class Base {
             }
 
             return Promise.each(['author_id', 'published_by', 'created_by', 'updated_by'], function (key) {
+                // CASE: not all fields exist on each model, skip them if so
                 if (!obj[key]) {
-                    return;
-                }
-
-                if (models.User.isOwnerUser(obj[key])) {
-                    return;
+                    return Promise.resolve();
                 }
 
                 oldUser = _.find(self.users, {id: obj[key]});
@@ -191,7 +188,14 @@ class Base {
                     dataToEdit = {};
                     dataToEdit[key] = userModel.id;
 
-                    return models[self.modelName].edit(dataToEdit, _.extend(options, {id: obj.model.id}));
+                    // CASE: updated_by is taken from the context object
+                    if (key === 'updated_by') {
+                        context = {context: {user: userModel.id}};
+                    } else {
+                        context = {};
+                    }
+
+                    return models[self.modelName].edit(dataToEdit, _.merge({}, options, {id: obj.model.id}, context));
                 });
             });
         });