Ruby 1.9.3-p545

AMI: https://console.aws.amazon.com/ec2/v2/home?region=eu-west-1#Images:search=ami-4b17ea3c

Followed this process: https://makandracards.com/housetrip-deck/17051-create-ami-for-integrity-slaves

Adds Ruby 1.9.3-p545

### AMI is ready so we should be able to deploy that!