THRIFT-4448: Golang: do something with context.Context. Remove Go1.6 compatibility.
Client: go

This closes #1459
diff --git a/lib/go/thrift/transport_test.go b/lib/go/thrift/transport_test.go
index 864958a..0127803 100644
--- a/lib/go/thrift/transport_test.go
+++ b/lib/go/thrift/transport_test.go
@@ -20,6 +20,7 @@
 package thrift
 
 import (
+	"context"
 	"io"
 	"net"
 	"strconv"
@@ -54,7 +55,7 @@
 	if err != nil {
 		t.Fatalf("Transport %T cannot write binary data of length %d: %s", writeTrans, len(transport_bdata), err)
 	}
-	err = writeTrans.Flush()
+	err = writeTrans.Flush(context.Background())
 	if err != nil {
 		t.Fatalf("Transport %T cannot flush write of binary data: %s", writeTrans, err)
 	}
@@ -74,7 +75,7 @@
 	if err != nil {
 		t.Fatalf("Transport %T cannot write binary data 2 of length %d: %s", writeTrans, len(transport_bdata), err)
 	}
-	err = writeTrans.Flush()
+	err = writeTrans.Flush(context.Background())
 	if err != nil {
 		t.Fatalf("Transport %T cannot flush write binary data 2: %s", writeTrans, err)
 	}
@@ -113,7 +114,7 @@
 	if err != nil {
 		t.Fatalf("Transport %T cannot write binary data of length %d: %s", writeTrans, len(transport_bdata), err)
 	}
-	err = writeTrans.Flush()
+	err = writeTrans.Flush(context.Background())
 	if err != nil {
 		t.Fatalf("Transport %T cannot flush write of binary data: %s", writeTrans, err)
 	}