Add simple tool for putting load on views

Change-Id: I741c85b764435f32c97bd8db4a59dffb2a728983
Reviewed-on: http://review.couchbase.org/29057
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>