ReplicationSourceManager doesn't cleanup the queues for recovered sources

Currently, ReplicationSourceManager only cleanups the queues for recovered sources when the queue is being closed. This can cause the already read WAL's files to be read again when a region server doing failover also dies. This can cause replication to possibly happen again

For e.g lets say RS1 dies with 5 files in queue and RS2 is doing the failover. Now, lets say RS2 dies after going thru 3 files in queue and RS3 is doing the failover. In this case, RS3 will again read those 3 files as they were not removed from the queue. (Though it will read the first file from the set pos. in ZK)