Merge pull request #187 from datacite/set-gzip-errors-to-http-406

use https status 406 instead of 500 for rack errors

lib/middleware/compressed_requests.rb

@@ -34,7 +34,7 @@ def call(env)
         [status, headers, response]
       rescue => err
         Rails.logger.error(err.inspect)
-        [500, {}, [{"status": 500, "title": err.message}.to_json]]
+        [406, {}, [{"status": 406, "title": err.message}.to_json]]
       end
     end