Matous, assigning over to you as I think you have already done this and if not, you are familiar enough with it to knock it out quickly. Thanks in advance.
Verified in 5.6.2.1. EC2 appliance image was working without any issues.
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-2016-1996.html