use INSTANCE_HOME environment variable, which is always set by either...

use INSTANCE_HOME environment variable, which is always set by either runUnitTest.py or zopectl. Also warn when previous dump is not found

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35490 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/custom_zodb.py

@@ -9,11 +9,12 @@ from asyncore import socket_map
 from ZODB.DemoStorage import DemoStorage
 from ZODB.FileStorage import FileStorage
 from Products.ERP5Type.tests.utils import getMySQLArguments, instance_random
-from Products.ERP5Type.tests.runUnitTest import instance_home, static_dir_list
+from Products.ERP5Type.tests.runUnitTest import static_dir_list
 
 def _print(message):
   sys.stderr.write(message + "\n")
 
+instance_home = os.environ['INSTANCE_HOME']
 zserver_list = os.environ.get('zserver', '').split(',')
 os.environ['zserver'] = zserver_list[0]
 
@@ -56,6 +57,7 @@ if load:
       ret = os.system("mysql %s < %s" % (getMySQLArguments(), dump_sql))
       assert not ret
     else:
+      _print("Could not find MySQL dump, will recreate catalog ... ")
       os.environ['erp5_tests_recreate_catalog'] = '1'
   _print("Restoring static files ... ")
   for dir in static_dir_list: