INT-2805 Update JavaMail to 1.4.5
There is a need to fetch the entire email message before the folder
is closed. Once the folder is closed, you cannot perform any
more operations on the message.
Prior to RC1, the message was copied, which forced an eager fetch.
Add code to copy the message.
Also, transaction synchronization operations need access to a folder
instance to perform operations, such as delete, on a message.
Add a wrapper to lazily create a folder instance in message.getFolder()
when needed.
Add documentation to explain that messages must be re-fetched before
performing transaction synchronization operations.
JavaMail 1.4.5 is now Open Source, which makes debugging much
easier.
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