Chunk server: fix object block table cleanup by invoking remove instead of delete in order to remove handle from the object table. Remove object store block from object block table in stale chunk method in order to handle invocation from  io failure handler.Release object block readable waiters, if any, from object block handle destructor.
Chunk server: fix object block table cleanup by invoking remove instead of delete in order to remove handle from the object table. Remove object store block from object block table in stale chunk method in order to handle invocation from  io failure handler.Release object block readable waiters, if any, from object block handle destructor.

quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs