add context factory method to tests

update scene_test outputs

version_test.go

@@ -11,10 +11,7 @@ func TestVersion(t *testing.T) {
 	defer disconnect()
 
 	var out bytes.Buffer
-	context := &context{
-		Client: client,
-		Out:    &out,
-	}
+	context := newContext(client, &out, "")
 
 	cmd := &ObsVersionCmd{}
 	err := cmd.Run(context)