additional namespacing on grinder transactions

[Travis Bear]

Currently we use a scheme like this: grinder.qaperf-grinder01.Ad_Click_establish_connection_time_under_20_ms

Ideally we want to be like this

grinder
   qaperf-grinder01
      Ad_Click
         tps_passed
         tps_failed
         http_errors
         time
            mean
            percentile
               50
               99
            group
               under_20_ms
               20_to_50_ms

[Travis Bear]

Additional stuff. Under each transaction:

http
    rc_200
    rc_302
    rc_500

[Travis Bear]

fixed