Java Kernel v1.2.1

This is a hotfix release recommanded for the user who is running the block mining software or the block staking software.

The hotfix release corrects the issue which the kernel accept the block has the future timestamp when the block comes from the RPC call. It might cause the kernel go to the side-chain status temporarily and then re-org back to the main-chain when the kernel has been connected to the mining/staking software.

Bug fixes:

• Applied the block timestamp check when the block import comes from the RPC call.