Chunk server: fix meta server state machine ops failing logic introduced by the last change and incorrectly assumed that queue is of type deque and not list.
Chunk server: fix meta server state machine ops failing logic introduced by the last change and incorrectly assumed that queue is of type deque and not list.

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