for Train+ openSUSE is no longer focusing on Leap 42.3 anymore,
so we shouldn't try to mirror it going forward. In order
to make this more flexible we need to break out the loop because
in general not all combinations of Base OS and OpenStack
release might be available.
Change-Id: If0a783d85ce292772b845dfc6bdf55abafb56cb9
2785f46b17