Action constructor dependency injection

[chriskapp]

Currently if you want to access a service from an action you need to implement the ContainerAwareInterface through this your action receives the complete DI container and can access specific services. This is an anti-pattern since you now use the DI container as service locator. Since our DI container supports now auto-wiring it would be great to support this also for all action/connection and provider implementation. Through this a user could simply create a constructor with the needed dependencies and the DI container resolves them automatically through the type-hint. This would help to develop more clean and testable actions.

[chriskapp]

This is now implemented