Make rspec random ordering the extension default
Drop deprecation warning for `relation.sum(&:block)`
Ensure FLOAT::INFINITY resolves to proper json on api
allow product rule to match 'none'

Fixes #4587
Drop shipment address code not used anywhere
Add index to spree_orders for user_id & created_by_id

Addresses potential performance regressions discussed at #4582 in the last_incomplete_spree_order method arising after that method changed in c455e1a

Fixes #4584