[WebBundle] Fix invalid html markup for payments forms

Added easier way to change states & hide editing for non super admins
[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
Fix specs
[AttributeBundle] Write specs for the LoadMetadataSubscriber
[VariationBundle] Write specs for the LoadMetadataSubscriber
Fix promotion scenarios and nth order rule checker
Test split up running