Bug 31492: Set CSRF token in circulation.pl

Bug 31492: Set CSRF token in circulation.pl

To test:
* Turn on patronimages system preferences
* Go to any patron account
* Hover over the 'dummy image' for the Add button
* Browse and select an image for upload
* Saving results in the following error:

The form submission failed (Wrong CSRF token). Try to come back, refresh the page, then try again.

Apply patch and try again. You shouldn't need to try twice, it should work on the first attempt now.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: David Cook <dcook@prosentient.com.au>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>