bt5_config: Donot install all BM together in tests

Installing all BM(s) together does disturb the dependency. It should
be only done after we have successfully applied layers and transferred
all BM to new format.

product/ERP5Type/tests/ERP5TypeTestCase.py

@@ -1032,7 +1032,6 @@ class ERP5TypeCommandLineTestCase(ERP5TypeTestCaseMixin):
 
         return False
 
-      bm_list = []
       for url, bt_title in business_template_list:
         if (update_business_templates and
             erp5_load_data_fs and
@@ -1056,7 +1055,7 @@ class ERP5TypeCommandLineTestCase(ERP5TypeTestCaseMixin):
         bt = template_tool.download(url)
         # If the bt is Business Manager, update the installation state
         if bt.getPortalType() == 'Business Manager':
-          bm_list.append(bt)
+          template_tool.updateInstallationState([bt])
           ZopeTestCase._print('(imported in %.3fs) ' % (time.time() - start))
           continue
 
@@ -1086,12 +1085,6 @@ class ERP5TypeCommandLineTestCase(ERP5TypeTestCaseMixin):
         if not quiet:
           ZopeTestCase._print('done (%.3fs)\n' % (time.time() - start))
 
-      start = time.time()
-      # Install all BM at one go
-      if bm_list:
-        template_tool.updateInstallationState(bm_list)
-        ZopeTestCase._print('finished installation of BMs in (%.3fs)\n' % (time.time() - start))
-
     def _getSiteCreationParameterDict(self):
       kw = _getConnectionStringDict()
       # manage_addERP5Site does not accept the following 2 arguments