CBQE-2054: for simple test logs goes only to file

Change-Id: I93232fd117456759d7fe3829623d9e0d9de15bd3
Reviewed-on: http://review.couchbase.org/33798
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>