Add a very simple timeout handling implementation to the test context runner to allow running the tests to completion on my test machine.
Add a very simple timeout handling implementation to the test context
runner to allow running the tests to completion on my test machine.

* test\test_util.c
  (test_helper_run_requests_no_check): Exit the context loop after using
    100% cpu for 15 seconds.

jandre/serf,jandre/serf,jandre/serf,jandre/serf