MB-100: Changed name for attribute

- ep_max_data_size => ep_max_size

Change-Id: I502632ee77d5357f557d22884de3178ae8a56101
Reviewed-on: http://review.couchbase.org/29398
Tested-by: abhinav dangeti <abhinav.dangeti@gmail.com>
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>