redirect /collection/AllCollectionReport to /collection/AllCollectionReport.html

[wowasa]

an explicit requirement from our September 25th meeting was to redirect a call to /collection/AllCollectionReport to /collection/AllCollectionReport.html. I make it more general:

• any html report should be callable with and without .html suffix
• if a report doesn't exist under the given name, the response must return a status code 404 instead of 500

[twagoo]

For the record, redirect /collection/AllCollectionReport to /collection/AllCollectionReport.html IFF HTML is requested via the Accept header. In the case of JSON, XML, TSV I think the response should be in the requested format without a redirect.