THRIFT-3428 go test fail on busy_machine

add some timeouts after server startup so clients do not connect too early
diff --git a/lib/go/test/tests/multiplexed_protocol_test.go b/lib/go/test/tests/multiplexed_protocol_test.go
index 00669ef..b1674bd 100644
--- a/lib/go/test/tests/multiplexed_protocol_test.go
+++ b/lib/go/test/tests/multiplexed_protocol_test.go
@@ -24,6 +24,7 @@
 	"net"
 	"testing"
 	"thrift"
+	"time"
 )
 
 func FindAvailableTCPServerPort() net.Addr {
@@ -68,6 +69,7 @@
 	processor.RegisterProcessor("SecondService", secondProcessor)
 
 	go server.Serve()
+	time.Sleep(10 * time.Millisecond)
 }
 
 var firstClient *multiplexedprotocoltest.FirstClient
diff --git a/lib/go/test/tests/one_way_test.go b/lib/go/test/tests/one_way_test.go
index 3ff025f..5bb1dae 100644
--- a/lib/go/test/tests/one_way_test.go
+++ b/lib/go/test/tests/one_way_test.go
@@ -60,6 +60,7 @@
 	server = thrift.NewTSimpleServer2(processor, serverTransport)
 
 	go server.Serve()
+	time.Sleep(10 * time.Millisecond)
 }
 
 func TestInitOnewayClient(t *testing.T) {