AWS does not recognize the subnet if it is presented in a comma delimited format with spaces. you must remove the space for Amazon to recognize the second subnet.
Make use of improved connect_to_aws that throws an exception
if a region can't be connected to (e.g. eu-central-1 requires
boto 2.34 onwards)
Add eu-central-1 to the two modules that hardcode their regions
Add us-gov-west-1 to ec2_ami_search to match documentation!
This pull request makes use of the changes in ansible/ansible#9419
