node: update node tests

Review feedback from @pires

node/pkg/node/node_test.go

@@ -840,8 +840,12 @@ func runConsensusTests(t *testing.T, testCases []testCase, numGuardians int) {
 
 	<-rootCtx.Done()
 	assert.NotEqual(t, rootCtx.Err(), context.DeadlineExceeded)
-	zapLogger.Info("Test root context cancelled, waiting 10ms for everything to shut down properly...")
-	time.Sleep(time.Millisecond * 50)
+	// There are some things that happen outside of the supervisor context and are a bit racey when the root context
+	// is shutdown. Namely some pkg/db bits, metrics sinks, and p2p logging. This gives them time to shutdown so the
+	// tests are happy.
+	wait := 50
+	zapLogger.Info("Test root context cancelled, waiting %dms for everything to shut down properly...", wait)
+	time.Sleep(time.Millisecond * wait)
 }
 
 type testCaseGuardianConfig struct {