Tweak waiting time for new values on channels in tests

Provide separate values for tests in debug and release mode (longer timeouts are
    needed by some tests, if they use full-length payout curve)

daemon/tests/harness/flow.rs

@@ -4,6 +4,9 @@ use daemon::tokio_ext::FutureExt;
 use std::time::Duration;
 use tokio::sync::watch;
 
+/// Waiting time for the time on the watch channel before returning error
+const NEXT_WAIT_TIME: Duration = Duration::from_secs(if cfg!(debug_assertions) { 120 } else { 30 });
+
 /// Returns the first `Cfd` from both channels
 ///
 /// Ensures that there is only one `Cfd` present in both channels.
@@ -55,9 +58,12 @@ where
     T: Clone,
 {
     rx.changed()
-        .timeout(Duration::from_secs(10))
+        .timeout(NEXT_WAIT_TIME)
         .await
-        .context("No change in channel within 10 seconds")??;
+        .context(format!(
+            "No change in channel within {} seconds",
+            NEXT_WAIT_TIME.as_secs()
+        ))??;
 
     Ok(rx.borrow().clone())
 }