Rename LRPStartAuction to LRPStart

* Remove StartAuctionBBS schema cruft

[#83638694]

Signed-off-by: Atul Kshirsagar <atul.kshirsagar@gmail.com>
Add Index validation to LRPStart

* Fix processing of its DesiredLRP validation error

[#83638694]

Signed-off-by: Atul Kshirsagar <atul.kshirsagar@gmail.com>
Add retry test for DesireTask

[#83638694]

Signed-off-by: Atul Kshirsagar <atul.kshirsagar@gmail.com>