Do not close other thread's conections since the same db instance is shared among multiple threads.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@13672 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ZMySQLDA/db.py

@@ -219,8 +219,6 @@ class DB(TM):
       ident = get_ident()
       db = self.db.get(ident)
       if db is None:
-        if len(self.db) != 0:
-          self.cleanupConnections()
         db = self.forceReconnection()
       return db