* Add script to generate and export production datasets

* Move hql script to ddl

* Document publish.sh

* Add some crude metrics reporting

* Store artifacts and metrics by run identifier

* Fix variable names

* Adjust var names, record timestamps in metrics

* Enable dynamic partitioning

* Add snapshot partition to production dataset

* Fix dir name

* Update publish.sh doc

* Make virtual env before activationg

* Fix: confidence_rating to source mapping

* Add export data summary

* Update validation notebook with regression cases

* Add test for confidence mapping

* Fix. call uuid4 for default dataset_id

* Fix missing coma in column list

* Export NULL values as empty strings.

* Genedate data for all languages

* Update data export changelog

* Update data export changelog: set month to March

* Clean up validation notebook

* Load validation data from hive

* Fix character escaping

T275685 automate pytest

T275162 enable spark metrics collection

Merge branch 'T275162-enable-spark-metrics-collection' of github.com:gmodena/ImageMatching into T275162-enable-spark-metrics-collection

T274798 include all unillustrated articles

The semantic of the algo output has changed
to include all unillustrated aritcles,
which includes articles with no matching images.

Production data etl

Automate generation of .tsv files