HUM-642 ec get performance
HUM-642 ec get performance

Request EC shards concurrently, and serve GET requests as soon as
enough shards have responded to reconstruct the object.

nadeemsyed/hummingbird,troubling/hummingbird,troubling/hummingbird,corystone/hummingbird,creiht/hummingbird,creiht/hummingbird,corystone/hummingbird,nadeemsyed/hummingbird