CBQE-1158: Automation tests- Optimistc XDCR

- Corrections in calls to set_environ_param

Change-Id: I39d982714febf541215ec5878cc0cb55cb85d8f4
Reviewed-on: http://review.couchbase.org/25314
Reviewed-by: abhinav dangeti <abhinav.dangeti@gmail.com>
Tested-by: abhinav dangeti <abhinav.dangeti@gmail.com>