recover old up_snapshot functionality

- We don't need the if settings.DEBUG anymore, we have a logger
configuration that when DEBUG is there, a trace is always generated
- restore old error message that is shorter and clearer than the new one

evidence/management/commands/up_snapshots.py

@@ -71,8 +71,6 @@ class Command(BaseCommand):
                 self.devices.append(Build(s, self.user))
                 move_json(p, self.user.institution.name)
             except Exception as err:
-                if settings.DEBUG:
-                    logger.exception("%s", err)
                 snapshot_id = s.get("uuid", "")
-                txt = "It is not possible to parse snapshot: %s"
+                txt = "Could not parse snapshot: %s"
                 logger.error(txt, snapshot_id)