queue processor tests: Call consume by default.

This significantly improves the API for queue_json_publish to not be
overly focused on what the behavior of this function should be in our
unit tests.

zerver/logging_handlers.py

@@ -106,7 +106,7 @@ class AdminZulipHandler(logging.Handler):
                 queue_json_publish('error_reports', dict(
                     type = "server",
                     report = report,
-                ), lambda x: None, call_consume_in_tests=True)
+                ))
         except Exception:
             # If this breaks, complain loudly but don't pass the traceback up the stream
             # However, we *don't* want to use logging.exception since that could trigger a loop.