Clean Up Direction for Data Manipulation with Hive Lab

Perform these clean up steps if the demo was previously run.

as user maria_dev run the following from Hive Ambari View
- drop table avg_mileage;
- drop table truck_mileage;
- drop table trucks;
- drop table geolocation;
- drop table trucks_stage;
- drop table geolocation_stage;
- reload HDFS folder /user/maria_dev/geolocation from instruction in Loading Data into HDFS