Add DeviceDetect proxy to autoload.

[koekaverna]

Add proxy class to autoloading to fix problem when already exists file with the same hash overrwited on every request

[renanbr]

Thanks for this PR @koekaverna

The DoctrineMongoDBBundle registers (and unregisters) its autoloader in the Kernel.

This seems a better approach.

We could make createConfiguration() public and play with this in the Kernel if the service is available, or skip this completely if the service isn't.