Children served not calculated correctly if there are kits

[cielf]

Summary

The children served number is not including children served with kits appropriately

Why fix?

Consistency. Corrextness.

Details

Regarding the Annual Survey
This method:
def children_served_with_kits_containing_disposables
organization
.distributions
.for_year(year)
.joins(line_items: {item: :kit})
.merge(Item.disposable)
.where.not(items: {kit_id: nil})
.distinct
.count("kits.id")
end

counts kits that are disposables (which will be 0), not kits that have disposables

Fix it.

(You probably shouldn't take this one unless you are familiar with both the annual survey and kits. And you might need to do SQL for this. So it's a little advanced)

Criteria for completion

• behaviour as decribed
• tests to confirm the behaviour