Increase the .durable quorum from 2 to "parity + 1" to guarantee that we will never fail to rebuild an object. Otherwise, with low durable responses back (< parity + 1), the putter objects return with failed attribute set to true, thereby failing the rebuild of fragments for an object. Change-Id: I80d666f61273e589d0990baa78fd657b3470785d Closes-Bug: 1484565