Merge pull request #1 from alitvinenko/refactor_for_symfony_3

FIX: The reserved indicator "@" cannot start a plain scalar; in services.yml

Author: sirian

src/Sirian/OpenExchangeRatesBundle/Resources/config/services.yml

@@ -2,13 +2,13 @@ services:
     open_exchange_rates.manager.doctrine:
         class: Sirian\OpenExchangeRatesBundle\Manager\DoctrineORMExchangeRateManager
         arguments:
-            - @?doctrine
+            - "@?doctrine"
             - Sirian\OpenExchangeRatesBundle\Entity\ExchangeRate
 
     open_exchange_rates.manager.doctrine_mongodb:
         class: Sirian\OpenExchangeRatesBundle\Manager\DoctrineODMExchangeRateManager
         arguments:
-            - @?doctrine_mongodb
+            - "@?doctrine_mongodb"
             - Sirian\OpenExchangeRatesBundle\Document\ExchangeRate
 
-    open_exchange_rates.manager: @open_exchange_rates.manager.doctrine
+    open_exchange_rates.manager: "@open_exchange_rates.manager.doctrine"