Add the ability to invoke a service with composite requests with Liferay 6.1

invoke_service.js

Liferay.Service.invoke = function(payload, success, failure){
    A.io.request(
		'/api/jsonws/invoke',
		{
			cache: false,
			data: {
				cmd: A.JSON.stringify(payload),
				p_auth: Liferay.authToken
			},
			dataType: 'json',
			on: {
				failure: failure,
				success: function(event) {
					if (success) {
						var data = this.get('responseData');

						success.apply(this, [data, event]);
					}
				}
			}
		}
	);
};