wait at the end of test to ensure proper cleanup

tools/chainbuilder/README.md

@@ -25,5 +25,3 @@ The following are the set of options when generating a chain:
 - `namespace` allows you to pick a custom v0 namespace. By default "test" will be chosen.
 
 This tool takes roughly 60-70ms per 2MB block.
-
-

tools/chainbuilder/integration_test.go

@@ -100,4 +100,5 @@ func TestRun(t *testing.T) {
 		return status.SyncInfo.LatestBlockHeight >= int64(numBlocks*2)
 	}, time.Second*10, time.Millisecond*100)
 	require.NoError(t, cometNode.Stop())
+	cometNode.Wait()
 }