runUnitTest: ZODB is removed on '--save', so also recreate the Catalog tables installed by bt5s.

Assuming that the test database already exists and 'movement' table already
contains data, on '--save' before this commit:
  1. Create a new ERP5 Site:
     1. Install erp5_mysql_innodb_catalog.
     2. Call ERP5Site_reindexAll(clear_catalog=True) (from ERP5Generator.setupIndex()).
        => At this point, erp5_mysql_innodb_catalog tables are recreated.
  2. Install erp5_movement_table_catalog or any bt5 adding a new SQL table.
     => This does not recreate the table and leave the existing data as it is.
  3. Dump MySQL database to dump.sql.
  => dump.sql contains 'INSERT INTO' for 'movement' table *before* calling runUnitTest command.

This fixes random Unit Tests failures on SQL queries accessing 'movement'
table directly and getting {non-existing,past executions} Movements.

product/ERP5Type/tests/custom_zodb.py

@@ -82,9 +82,12 @@ if load:
         if not live_instance_path:
           backup_path = os.path.basename(backup_path)
         os.symlink(backup_path, full_path)
-elif save and not (neo_storage or zeo_client) and os.path.exists(data_fs_path):
+elif save:
+  if not (neo_storage or zeo_client) and os.path.exists(data_fs_path):
     os.remove(data_fs_path)
 
+  os.environ['erp5_tests_recreate_catalog'] = '1'
+
 for static_dir in static_dir_list:
   static_dir = os.path.join(instance_home, static_dir)
   if not os.path.exists(static_dir):