bug 875352 Add a backfill function for weekly partitions

* Run backfill for weekly partitions for 'raw_crashes'
* Add alembic stamp to setupdb_app.py created schemas
* Cleaned up function per @AdrianGaudebert's feedback
* Update makefile for *.ini-dist copying in config/
Merge pull request #1264 from selenamarie/bug875352-backfill-partitions

bug 875352 Add a backfill function for weekly partitions