show better message when deciding not to continue

lib/tasks/gitlab/backup.rake

@@ -33,6 +33,7 @@ namespace :gitlab do
       backup.unpack
 
       unless backup.skipped?('db')
+        begin
           unless ENV['force'] == 'yes'
             warning = <<-MSG.strip_heredoc
               Before restoring the database, we will remove all existing
@@ -51,6 +52,10 @@ namespace :gitlab do
           Rake::Task['gitlab:db:drop_tables'].invoke
           $progress.puts 'done'.color(:green)
           Rake::Task['gitlab:backup:db:restore'].invoke
+        rescue Gitlab::TaskAbortedByUserError
+          puts "Quitting...".color(:red)
+          exit 1
+        end
       end
 
       Rake::Task['gitlab:backup:repo:restore'].invoke unless backup.skipped?('repositories')