test results updated


myisam/ft_boolean_search.c:
  cleanup
myisam/ft_parser.c:
  cleanup
  bug#2708
mysql-test/r/derived.result:
  error messages updated
mysql-test/r/fulltext.result:
  bug#2708
mysql-test/r/warnings.result:
  error messages updated
mysql-test/t/fulltext.test:
  bug#2708