[Summary] Server Release v1.2.0 TODOs

[simon824]

Big Changes (通告)

Hello everyone in the hugegraph community, we are preparing for the first Apache Release (V1.2.0)

This is a big change, and all component versions will be unified since then, we sincerely welcome everyone's participation and contribution, thank you

TODOs will be summarized here, and you can leave a comment or send a msg to claim them if u want

High Priority (高优先级)

• refact(api): update common 1.2 & fix jersey client code problem #2365
• chore: rollback cassandra to 3.11.16 #2374

Normal Priority (中优先级)

Low Priority (低优先级)

• refact(rocksdb): clean & reformat some code #2200

Note: we need adapt other relative repos