added spec replicating the problem

lib/gitlab/import_export/relation_factory.rb

@@ -14,7 +14,7 @@ module Gitlab
                     priorities: :label_priorities,
                     label: :project_label }.freeze
-      USER_REFERENCES = %w[author_id assignee_id updated_by_id user_id created_by_id merge_user_id].freeze
+      USER_REFERENCES = %w[author_id assignee_id updated_by_id user_id created_by_id merge_user_id resolved_by_id].freeze
       PROJECT_REFERENCES = %w[project_id source_project_id gl_project_id target_project_id].freeze

spec/lib/gitlab/import_export/members_mapper_spec.rb

@@ -75,8 +75,9 @@ describe Gitlab::ImportExport::MembersMapper, services: true do
       expect(user2.authorized_project?(project)).to be true
     end
-    context 'user is not admin' do
+    context 'user is not an admin' do
       let(:user) { create(:user, authorized_projects_populated: true) }
+
       it 'does not map a project member' do
         expect(members_mapper.map[exported_user_id]).to eq(user.id)
       end

spec/lib/gitlab/import_export/relation_factory_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe Gitlab::ImportExport::RelationFactory, lib: true do
   let(:project) { create(:empty_project) }
   let(:members_mapper) { double('members_mapper').as_null_object }
-  let(:user) { create(:user) }
+  let(:user) { create(:admin) }
   let(:created_object) do
     described_class.create(relation_sym: relation_sym,
                            relation_hash: relation_hash,
@@ -122,4 +122,60 @@ describe Gitlab::ImportExport::RelationFactory, lib: true do
       expect(created_object.values).not_to include(99)
     end
   end
+
+  context 'Notes user references' do
+    let(:relation_sym) { :notes }
+    let(:new_user) { create(:user) }
+    let(:exported_member) do
+      {
+        "id" => 999,
+        "access_level" => 30,
+        "source_id" => 1,
+        "source_type" => "Project",
+        "user_id" => 3,
+        "notification_level" => 3,
+        "created_at" => "2016-11-18T09:29:42.634Z",
+        "updated_at" => "2016-11-18T09:29:42.634Z",
+        "user" => {
+          "id" => new_user.id,
+          "email" => new_user.email,
+          "username" => new_user.username
+        }
+      }
+    end
+
+    let(:relation_hash) do
+      {
+        "id" => 4947,
+        "note" => "merged",
+        "noteable_type" => "MergeRequest",
+        "author_id" => 999,
+        "created_at" => "2016-11-18T09:29:42.634Z",
+        "updated_at" => "2016-11-18T09:29:42.634Z",
+        "project_id" => 1,
+        "attachment" => {
+          "url" => nil
+        },
+        "noteable_id" => 377,
+        "system" => true,
+        "author" => {
+          "name" => "Administrator"
+        },
+        "events" => [
+
+        ]
+      }
+    end
+
+    let(:members_mapper) do
+      Gitlab::ImportExport::MembersMapper.new(
+        exported_members: [exported_member],
+        user: user,
+        project: project)
+    end
+
+    it 'maps the right author to the imported note' do
+      expect(created_object.author).to eq(new_user)
+    end
+  end
 end