Javax WebSocket annotations not being used as default EndpointConfig

[lachlan-roberts]

Jetty version
10.0.x

Description
When adding an annotated endpoint with javax websockets given a specific EndpointConfig, the annotation configuration should be used as the default and any settings set in the provided EndpointConfig should override these default values.

Example:

@ServerEndpoint(value = "/my/{end}/{point}", 
        subprotocols = "my", 
        encoders = MyStringEncoder.class, 
        configurator = MyConfigurator.class)
public static class MyEndpoint
{
...
}
...

ServerEndpointConfig endpointConfig = ServerEndpointConfig.Builder
                .create(MyEndpoint.class, "/{end}/my/{point}")
                .subprotocols(Arrays.asList("end"))
                .build();
container.addEndpoint(endpointConfig);

This should result in an endpoint being added with:
uriTemplate = "/{end}/my/{point} (from manual endpoint config)
subprotocols = [ "end" ] (from manual endpoint config)
encoders = [ MyStringEncoder class reference ] (from annotation)
configurator = MyConfigurator class reference (from annotation)

[lachlan-roberts]

fixed with #4420