fix updated_at not preserved after import - for GitLab projects

lib/gitlab/import_export/project_tree_restorer.rb

@@ -12,7 +12,10 @@ module Gitlab
         json = IO.read(@path)
         @tree_hash = ActiveSupport::JSON.decode(json)
         @project_members = @tree_hash.delete('project_members')
+
+        ActiveRecord::Base.no_touching do
           create_relations
+        end
       rescue => e
         @shared.error(e)
         false

spec/lib/gitlab/import_export/project_tree_restorer_spec.rb

@@ -30,6 +30,14 @@ describe Gitlab::ImportExport::ProjectTreeRestorer, services: true do
         expect(Event.where.not(data: nil).first.data[:ref]).not_to be_empty
       end
 
+      it 'preserves updated_at on issues' do
+        restored_project_json
+
+        issue = Issue.where(description: 'Aliquam enim illo et possimus.').first
+
+        expect(issue.reload.updated_at.to_s).to eq('2016-06-14 15:02:47 UTC')
+      end
+
       context 'event at forth level of the tree' do
         let(:event) { Event.where(title: 'test levels').first }