User could set cannedACL, S3 repository would use this cannedACL to create s3 object and bucket.
Instead of throw an exception, this change log a warning message and accept any signer type.
Until now we had a cloud-aws plugin which is providing 2 disctinct features: * discovery on EC2 * snapshot/restore on S3 This commit splits the plugin by feature so people can use either one or the other or both features. Doc is updated accordingly.
xuzha
David Pilato