Fix transient failure in TodoService spec
Fix transient failure in TodoService spec

For reasons unknown, the lack of `and_call_original` on this message
expectation was causing a transient failure depending on test order. We
narrowed it down using `rspec --bisect` to the following order:

    spec/requests/openid_connect_spec.rb:123 spec/services/todo_service_spec.rb:751

dreampet/gitlab,LUMC/gitlabhq,htve/GitlabForChinese,darkrasid/gitlabhq,dreampet/gitlab,axilleas/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,dreampet/gitlab,iiet/iiet-git,iiet/iiet-git,stoplightio/gitlabhq,dplarson/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,t-zuehlsdorff/gitlabhq,LUMC/gitlabhq,stoplightio/gitlabhq,dplarson/gitlabhq,t-zuehlsdorff/gitlabhq,LUMC/gitlabhq,darkrasid/gitlabhq,darkrasid/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,htve/GitlabForChinese,jirutka/gitlabhq,stoplightio/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,jirutka/gitlabhq,jirutka/gitlabhq,htve/GitlabForChinese,LUMC/gitlabhq,htve/GitlabForChinese,mmkassem/gitlabhq,dplarson/gitlabhq,darkrasid/gitlabhq,t-zuehlsdorff/gitlabhq,t-zuehlsdorff/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,dplarson/gitlabhq