Spark Enrich: run the unit tests systematically in Travis (closes #3228)
Spark Enrich: run the unit tests systematically in Travis (closes #3228)

haensel-ams/snowplow,haensel-ams/snowplow,haensel-ams/snowplow,haensel-ams/snowplow,haensel-ams/snowplow,haensel-ams/snowplow