def launch_all
      @servers.each { |s|
        begin
          object_behavior(s, :start)
        rescue Exception => e
          raise e unless e.message =~ /AlreadyLaunchedError/
        end
      }
    end
def launch_all
      @servers.each { |s|
        begin
          object_behavior(s, :start)
        rescue Exception => e
          raise e unless e.message =~ /AlreadyLaunchedError/
        end
      }
    end
Launch all servers in the deployment.