fixup! runTestSuite: support multiple zserver addresses and frontends URLs

This was not really backward compatible with old slapos versions not passing
zserver_address_list

product/ERP5Type/tests/ERP5TypeTestSuite.py

@@ -24,6 +24,7 @@ class ERP5TypeTestSuite(TestSuite):
     if self.__dict__.has_key("bt5_path"):
       args = ("--bt5_path=%s" % self.bt5_path,) + args
     instance_number = self.instance or 1
+    if self.zserver_address_list:
       args = (
           '--zserver=%s' % self.zserver_address_list[instance_number-1],
           '--zserver_frontend_url=%s' % self.zserver_frontend_url_list[instance_number-1],

product/ERP5Type/tests/runTestSuite.py

@@ -111,7 +111,7 @@ def main():
   test_suite_title = args.test_suite_title or args.test_suite
   revision = args.revision
 
-  if len(args.zserver_address_list.split(",")) < args.node_quantity:
+  if args.zserver_address_list and len(args.zserver_address_list.split(",")) < args.node_quantity:
     print >> sys.stderr, 'Not enough zserver address/frontends for node quantity %s (%r)' % (
         args.node_quantity, args.zserver_address_list)
     sys.exit(1)