Non UTF-8 reported encoding trips up SimpleXML

[johnbillion]

The XML files from IM report that they use UTF-16 encoding despite actually being encoded as UTF-8. This trips up simplexml_load_string() in the XML_Files::parse_item() method.

For this particular migration, I've overrwritten the Files::get_file_contents() method in the importer class and performed a string replacement:

$contents = str_replace( 'encoding="utf-16"', 'encoding="utf-8"', $contents );

HMCI should include a verification that UTF-8 is in use in the imported XML file.