add autonode test example

See merge request jd-blockchain/jdchain!16

update kvdb

See merge request jd-blockchain/jdchain!14

add kvdb as git submodule

See merge request jd-blockchain/jdchain!13

Feature/kvdb

See merge request jd-blockchain/jdchain!11

* feature/1.4.0-SNAPSHOT: (82 commits)
  completed the integration of core, framework and test module with version 1.4.0-SNAPSHOT;
  created 1.4.0-SNAPSHOT version;
  publish 1.3.0.RELEASE;
  add the part 10;
  udpate;
  update;
  update;
  update event
  update for jira-446;
  update core
  update
  modify the code_example.MD;
  Update code_example.MD
  update;
  fix jira 444, modify active participant sdk
  update;
  update explorer;
  upate relation;
  event sample and doc
  update
  ...

# Conflicts:
#	libs/bft-smart