
Starting in SQLAlchemy 1.1, the rules for when "autoincrement=True" may be set on a column are more strict. The migrate tests are testing the alteration of a column from Integer to String and then regenerating; this means we need to set autoincrement to False as well. A related issue in SQLAlchemy 1.1 is also being fixed (see https://bitbucket.org/zzzeek/sqlalchemy/issues/3835/), however this fix is not needed in order for the tests to pass here. Change-Id: Ibd3a75fff13312411df87e17b6e5764865d69728