forgot to update default monitor

Change-Id: I126ca3b776b5c355a641aeab1f6e0a8939136ee3
Reviewed-on: http://review.couchbase.org/c/perfrunner/+/152605
Reviewed-by: Bo-Chun Wang <[email protected]>
Tested-by: Build Bot <[email protected]>

Author: korry8911

perfrunner/helpers/monitor.py

@@ -321,10 +321,12 @@ def _get_num_items(self, host: str, bucket: str, total: bool = False) -> int:
             return curr_items[-1]
         return 0
 
-    def monitor_num_items(self, host: str, bucket: str, num_items: int):
+    def monitor_num_items(self, host: str, bucket: str, num_items: int, max_retry: int=None):
         logger.info('Checking the number of items in {}'.format(bucket))
+        if not max_retry:
+            max_retry = self.MAX_RETRY
         retries = 0
-        while retries < self.MAX_RETRY:
+        while retries < max_retry:
             curr_items = self._get_num_items(host, bucket, total=True)
             if curr_items == num_items:
                 break