upgrade to aws-java-sdk-1.9.3
upgrade to aws-java-sdk-1.9.3

As of 1.9.0, the aws-java-sdk has been
broken up into multiple projects. This
change also changes the dependency to
just the cloudwatch and autoscaling
libraries that we use.

ccortezb/servo,sensaid/servo,entelesis/servo,fengshao0907/servo,gorcz/servo,brharrington/servo,eonezhang/servo,brharrington/servo,eonezhang/servo,entelesis/servo,rspieldenner/servo,Netflix/servo,ccortezb/servo,fengshao0907/servo,sensaid/servo