GetClient.java

    protected static ResteasyClient getClient() {

        CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        UsernamePasswordCredentials credentials = new UsernamePasswordCredentials("adminUser", "adminPassword");
        credentialsProvider.setCredentials(AuthScope.ANY, credentials);
        HttpClient httpclient = HttpClientBuilder.create().setDefaultCredentialsProvider(credentialsProvider).build();
        ApacheHttpClient4Engine engine = new ApacheHttpClient4Engine(httpclient, true);

        return new ResteasyClientBuilder().httpEngine(engine).build();
    }