QA - add_credentials_to_netrc() needed in configure_identity()

Context: https://gitlab.com/gitlab-org/gitlab-ee/commit/adcd7520776640568d79bfddec67de1f401ecdc2#note_122660899

https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/7808/diffs?commit_id=adcd7520776640568d79bfddec67de1f401ecdc2 introduced a bug where it breaks other tests, it needs to be reverted.