[LMS-2149] Create an integration test for archiving (eager archiving + rsync)

integration-tests/common.bash

integration-tests/run.sh

...s/templates/data-archiving/ARCHIVE_DATASET/archive-me.txt

...-tests/templates/data-archiving/scripts/jython-dropbox.py

integration-tests/templates/data/incoming-jython/.gitignore

...ates/datastore_server_archiving/etc/datastore_server.conf

...on-tests/templates/datastore_server_archiving/etc/log.xml

...mplates/datastore_server_archiving/etc/service.properties

integration-tests/test-archiving.sh