Kafka Connector

.........T [ZBXNEXT-8473] implemented base kafka connector

* commit 'f90a39ef507021f11079515eb2436f135f50efe7': (30 commits)
  .........T [ZBXNEXT-8473] fixed PR comments and updated plugin suppot
  .........T [ZBXNEXT-8473] code clean up
  .........T [ZBXNEXT-8473] fixed README and config PR comments
  .........T [ZBXNEXT-8473] code clean-up
  .........T [ZBXNEXT-8473] fixed sub-issues
  .......... [ZBXNEXT-8473] fixed readme
  .......... [ZBXNEXT-8473] fixed readme
  .......... [ZBXNEXT-8473] updated readme
  .........T [ZBXNEXT-8473] removed unused parameter
  .........T [ZBXNEXT-8473] code clean up
  .........T [ZBXNEXT-8473] added config comments
  ....I..... [ZBXNEXT-8473] added a simple Makefile
  .........T [ZBXNEXT-8473] code clean up
  .........T [ZBXNEXT-8473] fixed unit tests
  .........T [ZBXNEXT-8473] fixed lint issues
  .........T [ZBXNEXT-8473] fixed unit tests
  .........T [ZBXNEXT-8473] code clean up
  .........T [ZBXNEXT-8473] finished unit tests
  .........T [ZBXNEXT-8473] added part of server unit tests
  .........T [ZBXNEXT-8473] added PoC unit test for server middleware
  ...