Don't use get_site_ids in backfill_daily_metrics...

[bryanlandia]

populate_daily_metrics will do that. Just pass site=None if
none passed and task will run for all Sites

Change description

This only affects multisite deployments when using backfill_figutes_daily_metrics, but is a bug introduced and released in 0.4.dev13. We'll need to cut a new one.

Type of change

• Bug fix (fixes an issue)
• New feature (adds functionality)

Checklists

Development

• Lint rules pass locally
• Application changes have been tested thoroughly
• Automated tests covering modified code pass

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

Code review

• Pull request has a descriptive title and context useful to a reviewer. Screenshots or screencasts are attached as necessary
• "Ready for review" label attached and reviewers assigned
• Changes have been reviewed by at least one other contributor
• Pull request linked to task tracker where applicable