1. Pass { meta: true } when checking index template, because of changed ES SDK API
2. Added a flag to synchronize creation index template with writing logs:
   The issue is when logger is initialized it runs synchronously asynchronous method "start"
   Then app logger starts writing logs
   First time method append runs "tick" without interval
   As a result writing to ES goes first than creation of template, and template is not taken into account when index is created

The flag connected waits until start finishes connection and only than allows to write logs

@vanthome

fix #203