DEVX-1041: fix ksql websocket servlet initializor classes (#245)
DEVX-1041: fix ksql websocket servlet initializor classes (#245)

rbac-docker example was using incorrect security handler. The
fix was to set it to the same handler used by the rest servlet:
InstallBearerOrBasicSecurityHandler
confluentinc/examples,confluentinc/examples,confluentinc/examples,confluentinc/examples,confluentinc/examples,confluentinc/examples,confluentinc/examples,confluentinc/examples,confluentinc/examples,confluentinc/examples