the variable internalDate is still declared as final

The 'MAIL_DATE' column in the table 'JAMES_MAIL' isn't created because the variable 'internalDate' in the file 'AbstractJPAMailboxMessage.java' is still declared as final (related to Issue JAMES-1697), which causes the INTERNALDATE data item not to be returned when a fetch command is sent to the JAMES IMAP server.