The problem:
CSV storage engine open function returns success even
thought it failed to open the data file
The fix:
return error
Additional fixes:
added MY_WME to my_open to avoid mysterious error message
free share struct if open the file was unsuccessful


mysql-test/r/csv.result:
  test result
mysql-test/t/csv.test:
  test case
storage/csv/ha_tina.cc:
  The problem:
  CSV storage engine open function returns success even
  thought it failed to open the data file
  The fix:
  return error
  Additional fixes:
  added MY_WME to my_open to avoid mysterious error message
  free share struct if open the file was unsuccessful