Mars Lan fda572dd8a Allow the logback directory for ETL jobs to be overridden using system property (#448)
* Allow the logback directory for ETL jobs to be overridden using system property.

See https://logback.qos.ch/manual/configuration.html#variableSubstitution for more details.

* Add WHZ_ETL_TEMP_DIR env var and play config to control where the ETL job logs & temp files to be saved.

This enables us to move away from the default /var/tmp/wherehows directory.
2017-07-10 13:42:16 -07:00
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