test: always use Asia/Tokyo timezone for time literal in string
test: always use Asia/Tokyo timezone for time literal in string

"2013-02-06 13:05:07" is not timezone aware time literal.

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