Merge branch 'rs-reset-db' into 'master'

Run db:reset before db:create on CI

Should prevent build failures caused by missing migrations, such as
https://gitlab.com/gitlab-org/gitlab-ce/builds/439927

See merge request !2045

.gitlab-ci.yml

@@ -8,7 +8,7 @@ before_script:
   - touch log/application.log
   - touch log/test.log
   - bundle install --without postgres production --jobs $(nproc)  "${FLAGS[@]}"
-  - bundle exec rake db:create RAILS_ENV=test
+  - bundle exec rake db:reset db:create RAILS_ENV=test
 
 spec:feature:
   script: