tests: add sleep to catch reload timeout in clock_handler

[ibujna]

The reload timeout in clock_handler() is set to 1 second. Add a sleep to reliably trigger the event timeout during tests.

[dormando]

I'm not clear on this one either. The watcher should be waiting for the log lines to come in. What is this fixing, exactly?

[ibujna]

The libevent call for the proxy reload functionality is configured in the clock_handler()

memcached/memcached.c

Line 3907 in 4b9e619

struct timeval t = {.tv_sec = 1, .tv_usec = 0};

function with a 1-second interval.
On some systems (tested for example on macOS Tahoe), there is a situation where the reload waits for this 1-second libevent event, but in the meantime the test receives the log entry
"ts=12212211 gid=1000 type=proxy_conf status=start" from the socket.
At minimum, a 1-second sleep should be added here. Same as setup in clock_handler().
This happens randomly about for example once every ten runs.

[dormando]

@ibujna what's the actual test output when it fails?

I'm fairly sure I designed this test so that it just blocks until the 1 second timer clicks over, so I'm curious what log line you're getting that causes it to fail.

IIRC there's at least one other test where it'll wait for a while looking for a specific log line (edit: while ignoring anything else), and this test probably just needs that code.