Batch status data should be more consistent #656
Description
Currently a WriteBatch sent to an onBatchSuccess listener reports the getJobWritesSoFar as counted before the batch is written, yet the timestamp from after the batch was written. At the least, those should be consistent. I'm thinking the getJobWritesSoFar should be counted after the batch was written.
We should check all the other metrics reported by WriteBatch and QueryBatch/QueryEvent to make sure that they also are as consistent as possible about when they take their snapshot of the state of the job.