tools: rinaperf: use 10 seconds default duration only when -c is not specified
tools: rinaperf: use 10 seconds default duration only when -c is not specified

autrimpo/rlite,vmaffione/rlite,autrimpo/rlite,autrimpo/rlite,autrimpo/rlite,vmaffione/rlite,vmaffione/rlite,vmaffione/rlite