Changed error handling in load and controller to bubble up and return a 207 status code

Author: johnlpage

memex/templates/controller/Controller.java.template

@@ -96,7 +96,7 @@ public class __className__Controller {
                       return new ResponseEntity<>(returnValue, HttpStatus.MULTI_STATUS);
                   } catch (Exception e) {
                       LOG.error(e.getMessage());
-              }
+        }
         return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();
     }