Replace git.apache.org imports with github.com

Client: go
diff --git a/tutorial/go/src/client.go b/tutorial/go/src/client.go
index 1d658b9..e3ebe00 100644
--- a/tutorial/go/src/client.go
+++ b/tutorial/go/src/client.go
@@ -25,7 +25,7 @@
 	"fmt"
 	"tutorial"
 
-	"git.apache.org/thrift.git/lib/go/thrift"
+	"github.com/apache/thrift/lib/go/thrift"
 )
 
 var defaultCtx = context.Background()