Verified in 5.3.5.1.20150630091250_5515226 by putting it to the respective PostProvision AE method. The vm.scan call was successful and initiated the VM scan (tested against RHOS 5)
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/RHBA-2015-1223.html