Fix conversion of integer into string in board spec
Fix conversion of integer into string in board spec

In rails 5 controller specs, integers are converted to strings unless
conte-type is set with `as: :json`:
https://github.com/rails/rails/issues/26069

dreampet/gitlab,dreampet/gitlab,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,axilleas/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,iiet/iiet-git,iiet/iiet-git,jirutka/gitlabhq,jirutka/gitlabhq