LWR: Expand user properties (__user_name__, __user_email__, __user_id__) in job params before creating client.
This was final piece of puzzle for running jobs as real user through LWR. Now on just needs to add <param id="submit_user">$__user_name__</param> to LWR destination in job_conf.xml on Galaxy side to pass this information to the LWR. More complicated on the LWR side obviously, need to configure DRMAA, set job manager to be 'queued_external_drmaa', and setup sudo rules. Will add some details to LWR documentation shortly.