Test: Fix a test failed

Because: Below failure occurs

    #   Failed test at t/101_model_thread.t line 91.
    #     Structures begin differing at:
    #          $got->{created_at} = '2013-01-12 12:34:01'
    #     $expected->{created_at} = '2013-01-12 21:34:01'
Test: Fix a test failed

Because: Below exception occurs

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@ Teng 's Exception @@@@@
Reason  : DBD::mysql::db do failed: Field 'title' doesn't have a default value at /Users/asami/.plenv/versions/5.18.1/lib/perl5/site_perl/5.18.1/Teng.pm line 479.

SQL     :
          INSERT INTO `thread`
          (`body`, `created_at`, `user_id`)
          VALUES ('hogehoge', '2013-01-12 12:34:01', 1)

BIND    : $VAR1 = '';

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Test: Fix a test failed

Because: Below test fails
    #   Failed test at t/300_c_response.t line 56.
Merge pull request #35 from oguro1021/fix_tests

Fix tests