db: add initial alembic recipes

8 jobs for 1-alembic-recipes in 3 minutes and 13 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
passed py2.7-min-postgres #31924

00:02:47

passed py2.7-pypi-postgres #31925

00:02:53

69.0%
passed py3.6-min-mysql #31920

00:03:12

passed py3.6-min-postgres #31922

00:02:49

passed py3.6-min-sqlite #31918

00:02:45

passed py3.6-pypi-mysql #31921

00:03:10

70.0%
passed py3.6-pypi-postgres #31923

00:02:56

70.0%
passed py3.6-pypi-sqlite #31919

00:02:44

68.0%