Add a rudimentary test inspired from the "Using boto3" section in
the package README ([1]).
Note that it doesn't try to do anything with the instanciated
resource, as this would require a network connection when the test
runs.
[1]: https://github.com/boto/boto3
Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
