Default Log File Name for New Services

Previously, all new services created within IP would be instantiated with a loggerProps.log_filename value of pronghorn.log.

As of the 2021.2 release, these services will instead use the service_config name to generate a more specific default filename.

For example, an adapter created with the name adapter1 will now start with a default log_filename of adapter1.log. This only affects new services, and will not affect existing loggerProps configurations.