AttachmentSplitterBean - retrieve file name from Content Disposition

[engswee]

Add additional functionality to retrieve the attachment file name from the Content Disposition field of the MIME envelope as detailed the link below:-
https://blogs.sap.com/2015/04/13/attachmentsplitterbean-split-attachments-into-child-messages/comment-page-1/#comment-371552

[codebude]

Hi @engswee - the attached pullrequest should handle Robert's error. But to get sure, it would be nice, if he could test the changes on his machine.

[engswee]

Hi @codebude, thanks so much for the quick contribution.

I have reviewed the commits and from a purely static code review I think it needs further changes. Please have a look and let's discuss if you have any further inputs.

[robwarde]

@engswee @codebude working as expected. FYI the consumer is Salesforce. Thanks ever so much...

[codebude]

@robwarde Nice to hear that and thanks for the feedback 👍

[engswee]

@robwarde , Thanks for the update. That's great to hear!