Reduce time it takes to notice a task is complete

[MattMcL4475]

1. TES will no longer ask Batch for complete information on each task each time. Instead,
2. The controller will set each accepted task to QUEUED as it does today. That'll mean it is not assigned to a pool, yet.
3. BatchScheduler will set QUEUED tasks to INITIALIZING when assigning them to a pool. CloudTasks will be set to immediately expire when complete.
4. Scheduler/BatchScheduler will check the batch account blob for the current status of each task. When it's complete, it'll be thus processed.
5. A per-pool query for failed tasks will be performed for failed tasks that will be thus processed.
6. All the rest of the "error handling"/"hand holding" will be removed, including support for AutoPools.

In the future, #4 can be updated to cover other states, like "running", etc.

Task information beyond state will only be obtained when needed, not every loop. This will greatly diminish the number of calls to Batch, and greatly lessen the work TES is doing