MB-100: small change in conf file

Change-Id: I5cb2136580bc1b26fb060fc7fe0c4f78042f47d3
Reviewed-on: http://review.couchbase.org/25702
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>