title: Send additional attribute to remote portlet consuming with wsrp in liferay
body: <p>When consuming a remote portlet with wsrp, it is possible to send additional attributes and have access to them in the remote portlet? When setting a custom attribute to the current request object in liferay this attribute isn't accessible in the remote portlet, because it's a totally different session. Is there any best practice to solve this? Or isn't this a use case when consuming remote portlets with wsrp?</p>