updated AWS instructions
updated AWS instructions

The AWS Console instructions may just have been out of date due to changes on the console in the past few months, so those were updated. The AWS role script requires that the user have the AWS CLI installed and on the path.
hortonworks/cloudbreak,sequenceiq/cloudbreak,sequenceiq/cloudbreak,hortonworks/cloudbreak,sequenceiq/cloudbreak,hortonworks/cloudbreak,hortonworks/cloudbreak,sequenceiq/cloudbreak,sequenceiq/cloudbreak,hortonworks/cloudbreak,hortonworks/cloudbreak