MT#4025 Add contract_default flag to sound sets

lib/NGCP/Schema/Result/voip_sound_sets.pm

@@ -28,6 +28,8 @@ __PACKAGE__->add_columns(
   { data_type => "varchar", is_nullable => 1, size => 256 },
   "description",
   { data_type => "varchar", is_nullable => 1, size => 255 },
+  "contract_default",
+  { data_type => "tinyint", default_value => 0, is_nullable => 0 },
 );
 
 __PACKAGE__->set_primary_key("id");