Changed AWS credentials to use SDK standard.
Changed AWS credentials to use SDK standard.

As per: http://blogs.aws.amazon.com/security/post/Tx3D6U6WSFGOK2H/A-New-and-Standardized-Way-to-Manage-Credentials-in-the-AWS-SDKs

AppliedTrust/traildash,AppliedTrust/traildash,AppliedTrust/traildash,AppliedTrust/traildash