Added eu-west-3
Added eu-west-3

Main reference: https://aws.amazon.com/fr/blogs/aws/now-open-aws-eu-paris-region/

Signed-off-by: Quentin Pradet <d17611fde61d73f8de1b8b01bc47d446558ccd8e@apache.org>

andrewsomething/libcloud,apache/libcloud,Kami/libcloud,Scalr/libcloud,Scalr/libcloud,Kami/libcloud,mistio/libcloud,ByteInternet/libcloud,mistio/libcloud,vongazman/libcloud,mistio/libcloud,StackPointCloud/libcloud,ByteInternet/libcloud,StackPointCloud/libcloud,Kami/libcloud,andrewsomething/libcloud,vongazman/libcloud,ByteInternet/libcloud,StackPointCloud/libcloud,Scalr/libcloud,apache/libcloud,vongazman/libcloud,apache/libcloud,andrewsomething/libcloud