Configurable index name for Event & Alarm Forwarder
Description
The root index name for elasticsearch event and alarm forwarder needs to configurable making multiple instances of OpenNMS share a single instance of elasticsearch
We also use Elasticsearch in features/flows/elastic and features/situation-feedback/elastic, so the strategy taken here should be applied to those modules as well.
The root index name for elasticsearch event and alarm forwarder needs to configurable making multiple instances of OpenNMS share a single instance of elasticsearch