Update DB schema for #1199.
Move claimant_customer_id to trip claims.
Add trip_claim.claimant_trip_id. #1199.
Refactor list of trip ticket array fields.
Remove trip_ticket#approved_claim_id. #1199.
Merge trip purpose description and trip purpose code into "trip purpose." #1199.
Use datetime selects for trip ticket appt time and earliest pick-up time. #1199.
trip_ticket#origin_customer_id is now required. #1199.
Add latest DB schema.