Add helper function for ensure_connection
Add helper function for ensure_connection

It appears DatabaseWrapper.ensure_connection is not implemented
which is disconcerting that the coverage report shows the method
was called in the Django 1.5 builds..

Signed-off-by: Byron Ruth <e9d71f5ee7c92d6dc9e92ffdad17b8bd49418f98@devel.io>

murphyke/avocado,murphyke/avocado,murphyke/avocado,murphyke/avocado