CMFActivity: execute activities at most 4 times (instead of 6) before giving up

6 was the maximum value before commit 32877, when the number of retries depended
on the initial priority. The minimum was 1.

This lowers to some mean value, as 6 appears to be sometimes excessive.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42282 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFActivity/ActivityRuntimeEnvironment.py

@@ -21,7 +21,7 @@ class BaseMessage:
 
   delay = __property(delay=None)
   # None means infinite retry
-  max_retry = __property(max_retry=5)
+  max_retry = __property(max_retry=3)
   # For errors happening after message invocation (ConflictError),
   # should we retry quickly without increasing 'retry' count ?
   conflict_retry = __property(conflict_retry=True)