Zabbix

...G...... [DEV-1519] redis plugin: pass creds within key params, free resources when plugin is stopped, bugs fixes

* commit '412e790e96d995389c232bc596e3b96d46067718':
  ...G...... [DEV-1519] clean up
  ...G...... [DEV-1519] fixed config params and error handling in the info handler
  ...G...... [DEV-1519] pass creds within key params, freeing resources on stop, refactoring

(cherry picked from commit ca3925703a87b5e0ce905166290718491f4fa645)