added tests for "load" command with varying formats (exposes a bug?)
added tests for "load" command with varying formats (exposes a bug?)

test_load_text_key_by_arrays fails...

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