While fixing SQLAlchemy version modify Base Model class. Change-Id: I3e94a5abe4e7f5c85fe72d02f6f8048a7bd10d34
Change-Id: I733ae148c300165a35c7bba5cc3c331dc96d3df2
Signed-off-by: Julien Danjou <julien@danjou.info>