Without this patch, ansible parses the includes for containers,
even when running on metal, and therefore even if there is no
reason to do so.
This is a problem because some of those includes rely on variables
set by our dynamic inventory, and would fail when running OSA
with a static inventory on metal.
This patch solves the problem by ensuring the task will not
run unnecessarily.
Change-Id: I101b121d3d94673597a705979c38ea207043555f
ad985158b6