some bugs in recovery, reconnection of sync

recovery bug in sender:

• recovery is invalid in sender.
• some tsfiles maybe re-sender to receiver.
• some tsfiles maybe be deleted on receiver twice.
• now make the recovery valid in sender

reconnection bug in sender and receiver:

• reconnection is invalid both in sender and receiver
• maybe cause the receiver delete some tsfile which should not be deleted, because the log in receiver is wrong when time partition and vg is enable.
• maybe cause the sender can not connect to the receiver after the reconnection, because some info in receiver is missing after reconnection.
• now the reconnect can be set correctly.

remove some debug info in receiver