#875 - synchronize access to member variable
Merge remote-tracking branch 'origin/BroadleafCommerce-3.0.x' into BroadleafCommerce-3.1.x
#863 - have the add set the sequence to total records + 1
Merge branch 'BroadleafCommerce-3.1.x' into develop
Merge branch 'develop' into sku_browsing