Batch task auctions

* Send multiple task auctions in one request

[#84708268]

Signed-off-by: Alex Suraci <asuraci@pivotal.io>
Batch LRPStart requests

[#84708268]

Signed-off-by: Alex Suraci <asuraci@pivotal.io>
Pass all indices in a LRP Auction request

* Include all indices to start an auction
* Move the metrics into Schedule/Resubmit failures

[#84708268]

Signed-off-by: Alex Suraci <asuraci@pivotal.io>