* refactor(chalice): moved db_request_handler to utils package
* refactor(chalice): moved db_request_handler to utils package
fix(chalice): supported usability tests in EE
* refactor(crons): changed assist_events_aggregates_cron to have only 1 execution every hour
refactor(crons): optimized assist_events_aggregates_cron to use only 1 DB cursor for successive queries