Concordium node 6.1.7 for Testnet

Concordium node version 6.1.7 is released for testnet.

Load shedding has been added to gRPC v2 to help protect the node in case of a high number of concurrent requests. Also, note that this is the last node version that will support gRPC v1.

Updating to the newest node version is highly recommended.

Release for Mainnet is planned for October 23, 2023.