Fix bug #3879 Import broken for CSV using LOAD DATA
Importing CSV was also broken
Fix format specific options that were missing from ImportLdi plugin. Common code pulled out to AbstractImportCsv.class.php.
Minimize code duplication by pushing most of the common code to abstract parent class's setProperties() method
Merge pull request #267 from kasunchathuranga/Bug3879

Fix bug #3879 Import broken for CSV using LOAD DATA