Update API spec files to describe the correct class
Currently, we very often describe API::API
in the API specs (for instance here: https://gitlab.com/gitlab-org/gitlab-ce/blob/7100b76923fc88667b1bd22b34f0a43323fe84b0/spec/requests/api/award_emoji_spec.rb#L3).
We should describe the correct class, e.g. API::AwardEmoji
in this case.