THRIFT-2343 Fix tutotial code and codegen for methods without exceptions

Patch: Jens Geyer
diff --git a/tutorial/go/src/server.go b/tutorial/go/src/server.go
index ebcfe5b..e4c4b97 100644
--- a/tutorial/go/src/server.go
+++ b/tutorial/go/src/server.go
@@ -20,10 +20,10 @@
  */
 
 import (
+	"crypto/tls"
 	"fmt"
 	"git.apache.org/thrift.git/lib/go/thrift"
 	"tutorial"
-	"crypto/tls"
 )
 
 func runServer(transportFactory thrift.TTransportFactory, protocolFactory thrift.TProtocolFactory, addr string, secure bool) error {