moving back to modified, isn't included in vt15.
Verified on vt 15.1 - started a VM with 50 snapshots qemu version: qemu-kvm-rhev-2.1.2-23.el7_1.3.x86_64
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-2015-1103.html