Using the sed script from
https://gitlab.com/gitlab-org/gitlab-ce/issues/59758

Signed-off-by: Rémy Coutable <remy@rymai.me>

I've followed the [upgrade guide](https://github.com/thoughtbot/factory_bot/blob/4-9-0-stable/UPGRADE_FROM_FACTORY_GIRL.md

) and ran these two commands:

```
grep -e FactoryGirl **/*.rake **/*.rb -s -l | xargs sed -i "" "s|FactoryGirl|FactoryBot|"
grep -e factory_girl **/*.rake **/*.rb -s -l | xargs sed -i "" "s|factory_girl|factory_bot|"
```

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

FFaker can generate data that randomly break our test suite. This
simplifies our factories and use sequences which are more predictive.

Signed-off-by: Rémy Coutable <remy@rymai.me>