Rename factory_web to rc_factory_web, make built-in factory the default

rc_core/src/persist/vehicle_factory.rs

@@ -15,7 +15,7 @@ impl super::config::SelfValidator for FactoryConfig {
 }
 
 fn default_variant() -> AdapterSettings {
-    AdapterSettings::None
+    AdapterSettings::BuiltIn
 }
 
 #[derive(Serialize, Deserialize, Clone, Debug)]