README: Groovy script: fix UnixData and AmazonEC2Cloud
README: Groovy script: fix UnixData and AmazonEC2Cloud

jenkinsci/ec2-plugin,jenkinsci/ec2-plugin,mkozell/ec2-plugin,mkozell/ec2-plugin,jenkinsci/ec2-plugin,jenkinsci/ec2-plugin,mkozell/ec2-plugin,mkozell/ec2-plugin