Revert "add test and fix json and ltsv too"

This reverts commit 60ceb2aeb3029540fd39be1bf932e98f2a8ced7c.
Revert "Fix RegexpParser"

This reverts commit 26dc52fdead3b0b9fa2eb2c38e381d890cd002e3.
fill time with Time.now.to_i for missing @time_key records
Merge pull request #198 from tagomoris/v11_text_parser_fix

fix in_tail with v11 text_parser spec (time with nil without @time_key)