CCBC-434: Output errors (from logging) in tools

Change-Id: Id0bd5320cb82da47b3dc4bb8c7e4b58899258089
Reviewed-on: http://review.couchbase.org/38211
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Brett Lawson <brett19@gmail.com>