Update SDK test matrix to include OSX (#1833)
Update SDK test matrix to include OSX (#1833)

Updates the SDK test matrix to include a breakdown of linux and OSX changes.

Also allows Go 1.6 to fail.
aws/aws-sdk-go,yxd-hde/aws-sdk-go,yxd-hde/aws-sdk-go,yxd-hde/aws-sdk-go,yxd-hde/aws-sdk-go,jasdel/aws-sdk-go