CCBC-273: Increase granularity for timings between 1-10ms

Change-Id: Ie39e329a37172aef7b55b8b7384daeb08c60ab80
Reviewed-on: http://review.couchbase.org/38594
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>