Process file by file

Updated the harvester quite drastically by changing table names and greatly simplifying the way files get processed. The actual schema therefore needs to be dropped and recreated. 

All unzipped and zipped files should now be respectively stored at, and the data bags need to be updated accordingly:
/mnt/imos-t4/IMOS/archive/eMII/TALEND_harvester/AATAMS/aatams_sattag_nrt/unzipped
/mnt/imos-t4/IMOS/archive/eMII/TALEND_harvester/AATAMS/aatams_sattag_nrt/zipped

The metadata file to use is now located at:
/mnt/imos-t4/IMOS/archive/eMII/TALEND_harvester/AATAMS/metadata/aatams_sattag_metadata.csv

This harvester should be deployed before the AATAMS_SATTAG_DM harvester as the latter uses some of the tables in the aatams_sattag_nrt schema. Please let me know when this harvester gets deployed as I'll need to update the corresponding Geoserver layers.