Stop the controller's tests waiting out fixed intervals

Reading the build events waited two seconds on every queue read, the race
detector's exit sleep cost a second per command line a test runs, and the
lease and plan-wait tests waited out production intervals (novox/hq issue 591).

cmd/mesh-controller/lease_test.go

@@ -55,8 +55,13 @@ func TestTwoControllersOneActs(t *testing.T) {
 	inv := inventory.ForTest(t)
 	ctx := t.Context()
 
+	// Each renews five times and looks again ten times as often as a serving controller does, so the
+	// handover and the loss below are seen in a second, not in a renewal of five (novox/hq issue 591): what
+	// is checked is the order of events, which does not change with the interval.
+	const renewEvery, poll = lease.RenewEvery / 5, lease.Poll / 10
+
 	// Controller A takes the lease.
-	a := &actor{}
+	a := &actor{renewEvery: renewEvery, poll: poll}
 	aCtx, stopA := context.WithCancel(ctx)
 	defer stopA()
 	lostA, err := a.serveUnderTheLease(aCtx, inv, url)
@@ -69,7 +74,7 @@ func TestTwoControllersOneActs(t *testing.T) {
 	}
 
 	// Controller B starts while A holds it, and waits — acting on nothing meanwhile.
-	b := &actor{}
+	b := &actor{renewEvery: renewEvery, poll: poll}
 	bCtx, stopB := context.WithCancel(ctx)
 	defer stopB()
 	tookB := make(chan (<-chan struct{}), 1)
@@ -82,10 +87,11 @@ func TestTwoControllersOneActs(t *testing.T) {
 		}
 		tookB <- lost
 	}()
+	// B looks fifteen times, across one of A's renewals at least.
 	select {
 	case <-tookB:
 		t.Fatal("B took the lease while A held it")
-	case <-time.After(3 * time.Second):
+	case <-time.After(15 * poll):
 	}
 	if _, err := b.epoch(ctx); !errors.Is(err, lease.ErrNotHeld) {
 		t.Fatalf("B, waiting, may act: %v", err)
@@ -125,7 +131,7 @@ func TestTwoControllersOneActs(t *testing.T) {
 	}
 	select {
 	case <-lostB:
-	case <-time.After(2 * lease.RenewEvery):
+	case <-time.After(2 * renewEvery):
 		t.Fatal("B was not told it lost the lease")
 	}
 	if _, err := b.epoch(ctx); !errors.Is(err, lease.ErrNotHeld) {