[Summary] Preparations for Releasing HugeGraph 1.7 Version

[Pengzna]

TODOs

Legecies of 1.5 version

• PD/Store related doc transfer (to Wiki/Website) [Summary] Preparations for Releasing HugeGraph 1.5+ Version Doc hugegraph-doc#398
  • add pd hstore quickstart doc hugegraph-doc#402
• remove useless files
  • verify-license.json
    • hugegraph-pd/hg-pd-dist/src/assembly/static/conf/verify-license.json
      • refactor(pd/store): remove useless files & clean code #2681
• ci
  • merge Hstore CI with server ci
    • refact(ci): merge Hstore CI with server ci #2789
• remove the compatible code for Java8 / legacy code [Summary] Dropping Support for Java 8: Compatibility Breaks Ahead #2499
  • AuthServer/HugeSecurityManager (remove the Reflection code)
    • refactor: remove the package existing in java8 #2792
  • Disable legacy master-worker mechanism in multi-server @shirleyStorage
• pd-store docker:
  • url redirection
  • README

New tasks in 1.7 version

• Remove unnecessary backend code

  • BREAKING CHANGE(server): disable legacy backends include MySQL/PG/c*(.etc) #2746

• update toolchain to new version

  • feat(client): support graphspace hugegraph-toolchain#633
  • BREAKING CHANGE(hubble): upgrade to new version 2.0 [WIP]  hugegraph-toolchain#632

• support graphspace in server

• JRAFT Leader Preemption and Hessian Deserialization Vulnerabilities

• further migration from internal 3.7/4.0

  Main PR: BREAKING CHANGE: release version 1.7.0 [server + pd + store] #2889