Use let instead of instance var in volume price spec
Use let instead of instance var in volume price spec

By using a let and not an instance var in a before each block in the volume price spec we don’t create volume prices upfront.

solidusio-contrib/solidus_volume_pricing,solidusio-contrib/solidus_volume_pricing,solidusio-contrib/solidus_volume_pricing,solidusio-contrib/solidus_volume_pricing