Replace git.apache.org imports with github.com

Client: go
diff --git a/tutorial/go/src/main.go b/tutorial/go/src/main.go
index 63154e3..7730d7b 100644
--- a/tutorial/go/src/main.go
+++ b/tutorial/go/src/main.go
@@ -22,7 +22,7 @@
 import (
 	"flag"
 	"fmt"
-	"git.apache.org/thrift.git/lib/go/thrift"
+	"github.com/apache/thrift/lib/go/thrift"
 	"os"
 )