CBD-87: shorter labels for progress report
CBD-87: shorter labels for progress report

An example progress report output now looks like...

       :                total |       last |    per sec
 batch :                    2 |          2 |       31.5
 byte  :                    2 |          2 |       31.5
 msg   :                    6 |          6 |       94.4

Change-Id: Ibd7587311be887d56a6344726cf92e082254fdbd
Reviewed-on: http://review.couchbase.org/18116
Reviewed-by: Ronnie Sun <06648be64f8fbc529d817d157ec32d385ea42f22@couchbase.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

couchbaselabs/couchbase-cli,couchbaselabs/couchbase-cli,membase/membase-cli,couchbase/couchbase-cli,couchbaselabs/couchbase-cli,membase/membase-cli,couchbase/couchbase-cli,membase/membase-cli