Testing: See if there's a better way testing indexing

[m-i-l]

The run_tests.sh script just runs docker exec -it src_indexer_1 python /usr/src/app/search_my_site_scheduler.py at the moment. Need to figure out if there's a better way of testing the scraping process. There's a start in test_3_index.py but this throws a logging error and there isn't an assert to check for a return value or state. One workaround might be to implement the API call to trigger indexing for a site, i.e. #19