Add QA to test auto devops with DB_INITIALIZE and DB_MIGRATE
Add a whole new QA spec to run Auto devops flow to test `DB_INITIALIZE` and `DB_MIGRATE`. Possibly with a new rails app. The feature was added in gitlab-org/gitlab-ce#48004. ## Resources Eg. https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22025 https://gitlab.slack.com/archives/C3JJET4Q6/p1538486221000100 > use `Factory::Repository::ProjectPush.fabricate!`
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