Update test error message

testsuite/expect/test37.1

@@ -2425,7 +2425,7 @@ expect {
 		exp_continue
 	}
 	timeout {
-		send_user "\nFAILURE: sacctmgr add not responding\n"
+		send_user "\nFAILURE: sacctmgr delete cluster not responding\n"
 		slow_kill $my_pid
 		set exit_code 1
 	}