Error message "DNBXmlFilterError: primary author..." should display the submission ID

[TobiasWantzen]

Hello,

thanks for you good work with maintaining this plugin!

We have an error as follows (timestamp concealed):
[0000-00-00 00:00:00] [Warning] [tatup] Error exporting submission . DNBXmlFilter Error: The primary auther of the submission is required to be a registered author with this journal.

The submission ID should be displayed in this error message to make resolving possible.

BTW, please also note the typo: The primary auther should be The primary author ("author" with an "o").

Please note futhermore, that there is a type in the language key:
key="plugins.importexport.dnb.export.error.firestAuthorNotRegistred" and
key="plugins.importexport.dnb.export.error.firestAuthorNotRegistred.param"
should probably be "firstAuthor...", not "firest...".

Thanks!