[ResourceBundle] The collection form type has been improved
[AttributeBundle] Fix key names for validation_groups config
Merge pull request #2203 from adamelso/attribute-validation-groups-config

[AttributeBundle] Fix key names for validation_groups config
Merge pull request #2197 from aRn0D/form-collection

[ResourceBundle] The collection form type has been improved
[CoreBundle] Fix version constraint on jms/serializer-bundle
Merge pull request #2208 from adamelso/core-bundle-jms-serializer-version

[CoreBundle] Fix version constraint on jms/serializer-bundle
Adding elasticsearch to Vagrant box
Update bootstrap.sh
Merge pull request #2209 from antonioperic/master

Adding elasticsearch to Vagrant box
Added Volume based shipping calculator
Removed duplicate route `sylius_api_product_variant_delete`
Merge pull request #2212 from steffenbrem/feature/bug-fix-api-product-variants

Removed duplicate route `sylius_api_product_variant_delete`
Fix some CS issues
Merge pull request #2213 from stloyd/bugfix/cs

Fix some CS issues
Merge pull request #2210 from antonioperic/addingVolumeForShipping

Added Volume based shipping calculator
cascade-all for billing address preventing deletion of orders and cart resulting integrity constraint violation
Merge pull request #2217 from sudent/fix-order-billing-address

Change billing address mapping to cascade-persist
Set differentBillingAddress field optional