Rebase diskimage-builder to 1.26.1
Verified that RHOS 10 latest as of 24.01.2017 has diskimage-builder-1.26.1-1.el7ost package.
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-2017-0234.html