Java kernel v1.4.1 release

This is a recommended update release.

The release mainly fixed the bug in the new transaction pool in v1.4, It is highly recommended to update to this version if you have node v1.4.

Database configuration guide

Please see the v1.4 release note

Bug fixes:

• Fixed outdated transaction cause the transaction pool failure #1124
• Fixed the database close timing when the kernel shutting down #1126
• Corrected the difficulty reset for the staking block difficulty on load #1123

Other:

• Added the amity network consensus update number #1125