Symfony3 Factory Configuration

[cjgordon]

Hi,

I was receiving:

The attribute 'factory-service' is not allowed.

From:
aws_config.yml
aws_service.yml

This relates to changes in version 2.7 that are now deprecated in Symfony3.

To fix:

    <service id="aws_service" class="AwsService" factory-service="aws_factory" factory-method="get" abstract="true">
        <argument type="service" id="aws"/>
    </service>

Needs to be changed to:

 <service id="aws_service" class="AwsService" abstract="true">
        <factory service="aws_factory" method="get"/>
        <argument type="service" id="aws"/>
  </service>

I was going to fork and PR but I think this might cause some BC breaks of Symfony <2.7.

Cheers
Chris