Tools: Dummy play.py file added

Tools: Dummy play.py file added

There are jobs running "bgpuser" suite, which
relies on play.py script already in suite setup,
so currently it skips all test cases.

The full-blown play.py has still several days to
become polished enough to warrant merge into repository;
this change adds a file that just prints a message and quits.

The suite would still mostly fail because of that,
but with this file in place, the suite would
at least test for presence of Bug 3182.

Change-Id: Iee27fecc82e9d701e36a061766c9976598ada990
Signed-off-by: Vratko Polak <vrpolak@cisco.com>