Shipments filter fix

fixed createdAtFrom, createdAtTo.
dispatching variant creation event
Remove final keyword in SyliusCheckoutEvents.

I want to extend and add more events.
Include promotion total to PayPal gateway.
Set shipment state to onhold before process payment.
Fix currency converter. Use multiply.
fixed spec
Merge pull request #1060 from kayue/patch-5

Remove final keyword in SyliusCheckoutEvents.
Merge pull request #1063 from kayue/patch/order-shipping-state

Set shipment state to onhold before process payment.
Merge pull request #1059 from akovalyov/fix/generator-events

Proper dispatching of variant creation event
Merge pull request #1062 from kayue/patch-6

[BUG] Include promotion total to PayPal gateway.
Resource bundle depend on symfony form.
Merge pull request #1069 from aRn0D/composer

Resource bundle depend on symfony form.
Testing must take place in the en-US locale since tests are written for it.
This solve the behat failures for checking promotional discounts (most locales
show negative number as: -$100.00,  en-US shows ($100.00)
Fixes #853 along with other issues.
Merge pull request #1014 from mykehsd/feature/I#853-NumberformatterTesting

Numberformatter intl bugs with negative numbers
Update currency converter spec.
An application name can be defined
Missing Method
Merge pull request #1076 from aRn0D/doctrine-fix

[ResourceBundle][Fix]Missing Method
Remove hardcoded user class name