Verified in 5.7.1.1. I added AWS instance create to events in settings.yml. Then I went to rails console and checked EmsEvent whether there is a event for aws. I got as many events as I created instances.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2017-0320.html