Revert "Updates order api to use Order#item_total instead of #total"
Revert "Updates order api to use Order#item_total instead of #total"

This reverts commit 22ad600c271ef94b7c1a04a061f25b4615895980.

firmanm/spree_chimpy,wuboy0307/solidus_chimpy,asketsthlm/spree_chimpy,firmanm/spree_chimpy,DekaFugihara/spree_chimpy,WalkerAndCoBrandsInc/spree_chimpy,WalkerAndCoBrandsInc/spree_chimpy,DynamoMTL/spree_chimpy,DynamoMTL/spree_chimpy,asketsthlm/spree_chimpy,wuboy0307/solidus_chimpy,WalkerAndCoBrandsInc/spree_chimpy,andreteves/spree_chimpy,DekaFugihara/spree_chimpy,wuboy0307/spree_chimpy,andreteves/spree_chimpy,JuandGirald/spree_chimpy,JuandGirald/spree_chimpy,wuboy0307/spree_chimpy,wuboy0307/spree_chimpy,asketsthlm/spree_chimpy,firmanm/spree_chimpy,andreteves/spree_chimpy,wuboy0307/solidus_chimpy,JuandGirald/spree_chimpy,DekaFugihara/spree_chimpy,DynamoMTL/spree_chimpy