Increase long wait to 5 minutes instead 3 minutes between runs.

This value could be much higher in future because it is only sleep for so
long after instance be well setupped.

slapos/recipe/erp5/erp5.py

@@ -37,7 +37,7 @@ class ERP5Updater(object):
   erp5_catalog_storage = "erp5_mysql_innodb_catalog"
   header_dict = {}
 
-  sleeping_time = 120
+  sleeping_time = 300
 
   def __init__(self, user, password, host,
       site_id, mysql_url, memcached_address,