traffic_ops/app/conf/production/influxdb.conf

According to DeliveryServiceStats.pm::get_db_name(), the key holding the deliveryservice database name in influxDb is "deliveryservice_stats_db_name".
The key and value found in production/influxdb.conf are wrong.
The keys and values found at test/influxdb.conf and development/influxdb.conf are good.

This code is used by the /api/1.2/deliveryservice_stats TO API, and prevented DS graphs from being displayed in traffic portal

PR #264 fixes this