This fix changes the timeout for BLPOP in this test case from 1 second
to 0.5 seconds.
In the test case quoted below, the procedure
`wait_for_blocked_clients_count` waits for one second by default. If
BLPOP has 1 second timeout and the first
`wait_for_blocked_clients_count` finishes very fast, then the second
`wait_for_blocked_clients_count` can time out before the BLPOP has been
unblocked.
```TCL
test "CLUSTER SLOT-STATS cpu-usec for blocking commands, unblocked on timeout." {
# Blocking command with 1 second timeout.
set rd [valkey_deferring_client]
$rd BLPOP $key 1
# Confirm that the client is blocked, then unblocked after 1 second timeout.
wait_for_blocked_clients_count 1
wait_for_blocked_clients_count 0
```
As seen in the definition of `wait_for_blocked_clients_count`, the total
time to wait is 1 second by default.
```TCL
proc wait_for_blocked_clients_count {count {maxtries 100} {delay 10} {idx 0}} {
wait_for_condition $maxtries $delay {
[s $idx blocked_clients] == $count
} else {
fail "Timeout waiting for blocked clients"
}
}
```
Fixes#1121
Signed-off-by: Viktor Söderqvist <viktor.soderqvist@est.tech>
2dfe25b408