Removed OperationComplete Tracker

Seemed to slow things down - maybe causing too many tasks?
Added timer helper
Added test that is purely raven performance
Fixed performance test timing
Remove extra async on LastCompleteItemAgent
Speed test for grouping queue
Fix throughput count
Use non async tracker.start
Fix log message for Bulk Raven Test
Add Raven Replay Projector
Replay Projector: Throw for invalid operation types