Shut off the email to admins when a badly-formed excel file is uploaded by a user (the user gets a message through the UI, and since it is not a 500 server error, there is no need to report it as one)
shortening comment
Merge pull request #1288 from SEL-Columbia/XLSForm-publishing-Exception-as-non-500

Shut off the email to admins when a badly-formed excel file is uploaded ...