Keep resource client method isolated

[koriym]

class Holder extends ResourceObject
{
    public function __construct(ResourceInterface $resource)
    {
        $resource->get->uri('app://self/author?id=1')->eager->request();
    }
    public function onPost()
    {
        return true;
    }
}

When constructor has another resource request, request method was shared with two resource request client because it is injected as a singleton. This PR fix the issue.

This issue is appeared when the form which has resource request in init() injected resource client.