[devel] Upload XML Gauss Summaries into Elasticsearch

Added a utility transforming XML Gauss summaries into JSON files and changed UploadMC.py in order to upload them to Elasticsearch

BEGINRELEASENOTES

*ProductionManagement: NEW: Module that transforms XML Gauss summaries into JSON format CHANGE: Update UploadMC.py to ingest Gauss summaries to ES

ENDRELEASENOTES

NOTE that some tests might fail since XMLtoJSON.py is using xmltodict which may not be installed yet.