Request missing addresses while receiving a new last address

[Neylix]

Describe the problem you discovered

When a node is a storage node of any transaction of a chain, it is notified when a new transaction is created in this chain.
This notification aims to append the new transaction address in the DB, so the node always know the last address of a chain it is storing.
But for some reason, it way happen that a node do not receive some notification and when it will receive the next one, the DB will append the transaction address without the ones previously missed.

Describe the solution you'd like

When a node receive a last address notification (NotifyLastTransactionAddress message), the node should verify that it's last local address is the previous address of the new last address it receive.
If it is the case, append the address in DB, if not the node should request the missing address between it's last local address and the last it received, and append them in DB in chronological order.

Edit :
In the PR #671 a new message has been created to ask the missing addresses of a chain GetNextAddresses. This message can be reused. The integration is in the repair_worker file, but it may be moved in self_repair file to have a common function for repair_worker and notify_last_address