[test][ruby] don't add --show-detail-immediately option explicitly.
[test][ruby] don't add --show-detail-immediately option explicitly.

It is enabled by default.

naoa/groonga,kenhys/groonga,cosmo0920/groonga,naoa/groonga,redfigure/groonga,redfigure/groonga,kenhys/groonga,kenhys/groonga,naoa/groonga,cosmo0920/groonga,cosmo0920/groonga,groonga/groonga,cosmo0920/groonga,hiroyuki-sato/groonga,myokoym/groonga,myokoym/groonga,redfigure/groonga,redfigure/groonga,redfigure/groonga,komainu8/groonga,redfigure/groonga,naoa/groonga,hiroyuki-sato/groonga,redfigure/groonga,naoa/groonga,hiroyuki-sato/groonga,myokoym/groonga,komainu8/groonga,groonga/groonga,groonga/groonga,kenhys/groonga,komainu8/groonga,myokoym/groonga,hiroyuki-sato/groonga,myokoym/groonga,myokoym/groonga,komainu8/groonga,kenhys/groonga,hiroyuki-sato/groonga,groonga/groonga,naoa/groonga,cosmo0920/groonga,komainu8/groonga,groonga/groonga,groonga/groonga,kenhys/groonga,kenhys/groonga,myokoym/groonga,kenhys/groonga,myokoym/groonga,komainu8/groonga,cosmo0920/groonga,cosmo0920/groonga,komainu8/groonga,groonga/groonga,groonga/groonga,naoa/groonga,komainu8/groonga,hiroyuki-sato/groonga,redfigure/groonga,naoa/groonga,hiroyuki-sato/groonga,hiroyuki-sato/groonga,cosmo0920/groonga