Add tripleo-ui image to skipped image list
Add tripleo-ui image to skipped image list

There is some issue on tripleo-ui side, which block the kolla gate.
Revert me when https://bugs.launchpad.net/tripleo/+bug/1744215 is
fixed.

Change-Id: I68867f0bbabad61d583761d54c35d1df15fb8698
Related-Bug: #1744215

rahulunair/kolla,openstack/kolla,stackforge/kolla,openstack/kolla,rahulunair/kolla,stackforge/kolla,stackforge/kolla