stage and prod data directory name change

The stage and production environments now have a share of `/rialto-data`
rather than `/data`. Since we map this location as part of the
docker compose configuration it should only need to be updated there.

Fixes #145

compose.prod.yaml

@@ -90,7 +90,7 @@ x-airflow-common:
     AIRFLOW_VAR_PUBLISH_DIR: /opt/airflow/data/latest
   volumes:
     - /opt/app/rialto/rialto-airflow/current/rialto_airflow:/opt/airflow/rialto_airflow
-    - /data:/opt/airflow/data
+    - /rialto-data:/opt/airflow/data
     - /opt/app/rialto/rialto-airflow/shared/logs:/opt/airflow/logs
   user: "503:0"
   depends_on: