- Implemented ha_archive::rename_table
 - Added testcases for rename


mysql-test/r/archive.result:
  Addd testcase for rename of archive table
mysql-test/t/archive.test:
  Addd testcase for rename of archive table
sql/examples/ha_archive.cc:
  Implement special version of rename table that does not care it the .arn file is missing
sql/examples/ha_archive.h:
  Implement special version of rename table that does not care it the .arn file is missing