Test opensuse 15 builds with 15.2
Test opensuse 15 builds with 15.2

15.2 is the latest 15 release and is what we should test with.

Change-Id: I824c6bef9ad9b288cb766d05879a587263916a9e

switch-ch/diskimage-builder,switch-ch/diskimage-builder,openstack/diskimage-builder,openstack/diskimage-builder