Tweak logging when object fails to be executed

tailbone/views/master.py

@@ -833,7 +833,7 @@ class MasterView(View):
         # If anything goes wrong, rollback and log the error etc.
         except Exception as error:
             session.rollback()
-            log.exception("execution failed for object: {}".format(obj))
+            log.exception("{} failed to execute: {}".format(self.get_model_title(), obj))
             session.close()
             if progress:
                 progress.session.load()